670431977 has 2 divisors, whose sum is σ = 670431978. Its totient is φ = 670431976.

The previous prime is 670431961. The next prime is 670432003. The reversal of 670431977 is 779134076.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 662753536 + 7678441 = 25744^2 + 2771^2 .

It is a cyclic number.

It is not a de Polignac number, because 670431977 - 2⁴ = 670431961 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (670431277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335215988 + 335215989.

It is an arithmetic number, because the mean of its divisors is an integer number (335215989).

Almost surely, 2^670431977 is an apocalyptic number.

It is an amenable number.

670431977 is a deficient number, since it is larger than the sum of its proper divisors (1).

670431977 is an equidigital number, since it uses as much as digits as its factorization.

670431977 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 222264, while the sum is 44.

The square root of 670431977 is about 25892.7012302695. The cubic root of 670431977 is about 875.2220288805. Note that the first 3 decimals are identical.

The spelling of 670431977 in words is "six hundred seventy million, four hundred thirty-one thousand, nine hundred seventy-seven".