670531 has 4 divisors (see below), whose sum is σ = 709992. Its totient is φ = 631072.

The previous prime is 670517. The next prime is 670541. The reversal of 670531 is 135076.

670531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 670531 - 2¹³ = 662339 is a prime.

It is a super-2 number, since 2×670531² = 899223643922, which contains 22 as substring.

It is a Duffinian number.

670531 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (670511) 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, 19705 + ... + 19738.

It is an arithmetic number, because the mean of its divisors is an integer number (177498).

2⁶⁷⁰⁵³¹ is an apocalyptic number.

670531 is a deficient number, since it is larger than the sum of its proper divisors (39461).

670531 is a wasteful number, since it uses less digits than its factorization.

670531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39460.

The product of its (nonzero) digits is 630, while the sum is 22.

The square root of 670531 is about 818.8595728206. The cubic root of 670531 is about 87.5265116943.

The spelling of 670531 in words is "six hundred seventy thousand, five hundred thirty-one".