670992617 has 2 divisors, whose sum is σ = 670992618. Its totient is φ = 670992616.

The previous prime is 670992599. The next prime is 670992631. The reversal of 670992617 is 716299076.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 641659561 + 29333056 = 25331^2 + 5416^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-670992617 is a prime.

It is not a weakly prime, because it can be changed into another prime (670995617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335496308 + 335496309.

It is an arithmetic number, because the mean of its divisors is an integer number (335496309).

Almost surely, 2^670992617 is an apocalyptic number.

It is an amenable number.

670992617 is a deficient number, since it is larger than the sum of its proper divisors (1).

670992617 is an equidigital number, since it uses as much as digits as its factorization.

670992617 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 285768, while the sum is 47.

The square root of 670992617 is about 25903.5251848083. The cubic root of 670992617 is about 875.4659252451.

The spelling of 670992617 in words is "six hundred seventy million, nine hundred ninety-two thousand, six hundred seventeen".