670957 has 6 divisors (see below), whose sum is σ = 780558. Its totient is φ = 575064.

The previous prime is 670951. The next prime is 670963. The reversal of 670957 is 759076.

It is an interprime number because it is at equal distance from previous prime (670951) and next prime (670963).

It can be written as a sum of positive squares in only one way, i.e., 670761 + 196 = 819^2 + 14^2 .

It is not a de Polignac number, because 670957 - 2¹⁹ = 146669 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 670957.

It is not an unprimeable number, because it can be changed into a prime (670951) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6798 + ... + 6895.

It is an arithmetic number, because the mean of its divisors is an integer number (130093).

2⁶⁷⁰⁹⁵⁷ is an apocalyptic number.

It is an amenable number.

670957 is a deficient number, since it is larger than the sum of its proper divisors (109601).

670957 is a wasteful number, since it uses less digits than its factorization.

670957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13707 (or 13700 counting only the distinct ones).

The product of its (nonzero) digits is 13230, while the sum is 34.

The square root of 670957 is about 819.1196493797. The cubic root of 670957 is about 87.5450434751.

The spelling of 670957 in words is "six hundred seventy thousand, nine hundred fifty-seven".