699321641 has 4 divisors (see below), whose sum is σ = 699374532. Its totient is φ = 699268752.

The previous prime is 699321617. The next prime is 699321743. The reversal of 699321641 is 146123996.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 625000000 + 74321641 = 25000^2 + 8621^2 .

It is a cyclic number.

It is not a de Polignac number, because 699321641 - 2¹⁰ = 699320617 is a prime.

It is a super-3 number, since 3×699321641³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (699321611) 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, 13031 + ... + 39603.

It is an arithmetic number, because the mean of its divisors is an integer number (174843633).

Almost surely, 2^699321641 is an apocalyptic number.

It is an amenable number.

699321641 is a deficient number, since it is larger than the sum of its proper divisors (52891).

699321641 is a wasteful number, since it uses less digits than its factorization.

699321641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52890.

The product of its digits is 69984, while the sum is 41.

The square root of 699321641 is about 26444.6902231809. The cubic root of 699321641 is about 887.6170911040.

The spelling of 699321641 in words is "six hundred ninety-nine million, three hundred twenty-one thousand, six hundred forty-one".