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670898813 = 1351607601
BaseRepresentation
bin100111111111010…
…001101001111101
31201202102012011012
4213333101221331
52333222230223
6150323405005
722424355134
oct4777215175
91652365135
10670898813
11314783232
12168823765
13a8cc0560
146516091b
153dd74c78
hex27fd1a7d

670898813 has 4 divisors (see below), whose sum is σ = 722506428. Its totient is φ = 619291200.

The previous prime is 670898803. The next prime is 670898827. The reversal of 670898813 is 318898076.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 210453049 + 460445764 = 14507^2 + 21458^2 .

It is a cyclic number.

It is not a de Polignac number, because 670898813 - 218 = 670636669 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (670898803) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25803788 + ... + 25803813.

It is an arithmetic number, because the mean of its divisors is an integer number (180626607).

Almost surely, 2670898813 is an apocalyptic number.

It is an amenable number.

670898813 is a deficient number, since it is larger than the sum of its proper divisors (51607615).

670898813 is a wasteful number, since it uses less digits than its factorization.

670898813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51607614.

The product of its (nonzero) digits is 580608, while the sum is 50.

The square root of 670898813 is about 25901.7144799336. The cubic root of 670898813 is about 875.4251269656.

The spelling of 670898813 in words is "six hundred seventy million, eight hundred ninety-eight thousand, eight hundred thirteen".

Divisors: 1 13 51607601 670898813