670437997 has 2 divisors, whose sum is σ = 670437998. Its totient is φ = 670437996.

The previous prime is 670437967. The next prime is 670438049. The reversal of 670437997 is 799734076.

It is an a-pointer prime, because the next prime (670438049) can be obtained adding 670437997 to its sum of digits (52).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 614097961 + 56340036 = 24781^2 + 7506^2 .

It is a cyclic number.

It is not a de Polignac number, because 670437997 - 2²³ = 662049389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (670437967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335218998 + 335218999.

It is an arithmetic number, because the mean of its divisors is an integer number (335218999).

Almost surely, 2^670437997 is an apocalyptic number.

It is an amenable number.

670437997 is a deficient number, since it is larger than the sum of its proper divisors (1).

670437997 is an equidigital number, since it uses as much as digits as its factorization.

670437997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2000376, while the sum is 52.

The square root of 670437997 is about 25892.8174789844. The cubic root of 670437997 is about 875.2246484954.

The spelling of 670437997 in words is "six hundred seventy million, four hundred thirty-seven thousand, nine hundred ninety-seven".