97640629 has 2 divisors, whose sum is σ = 97640630. Its totient is φ = 97640628.

The previous prime is 97640617. The next prime is 97640671. The reversal of 97640629 is 92604679.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 97416900 + 223729 = 9870^2 + 473^2 .

It is a cyclic number.

It is not a de Polignac number, because 97640629 - 2⁵ = 97640597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97640329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48820314 + 48820315.

It is an arithmetic number, because the mean of its divisors is an integer number (48820315).

Almost surely, 2^97640629 is an apocalyptic number.

It is an amenable number.

97640629 is a deficient number, since it is larger than the sum of its proper divisors (1).

97640629 is an equidigital number, since it uses as much as digits as its factorization.

97640629 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 163296, while the sum is 43.

The square root of 97640629 is about 9881.3272893878. The cubic root of 97640629 is about 460.4793820981.

The spelling of 97640629 in words is "ninety-seven million, six hundred forty thousand, six hundred twenty-nine".