670423157 has 2 divisors, whose sum is σ = 670423158. Its totient is φ = 670423156.

The previous prime is 670423147. The next prime is 670423177. The reversal of 670423157 is 751324076.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 510805201 + 159617956 = 22601^2 + 12634^2 .

It is a cyclic number.

It is not a de Polignac number, because 670423157 - 2²⁶ = 603314293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (670423147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335211578 + 335211579.

It is an arithmetic number, because the mean of its divisors is an integer number (335211579).

Almost surely, 2^670423157 is an apocalyptic number.

It is an amenable number.

670423157 is a deficient number, since it is larger than the sum of its proper divisors (1).

670423157 is an equidigital number, since it uses as much as digits as its factorization.

670423157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 35280, while the sum is 35.

The square root of 670423157 is about 25892.5309114424. The cubic root of 670423157 is about 875.2181908117.

The spelling of 670423157 in words is "six hundred seventy million, four hundred twenty-three thousand, one hundred fifty-seven".