697946129 has 2 divisors, whose sum is σ = 697946130. Its totient is φ = 697946128.

The previous prime is 697946113. The next prime is 697946149. The reversal of 697946129 is 921649796.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 442681600 + 255264529 = 21040^2 + 15977^2 .

It is a cyclic number.

It is not a de Polignac number, because 697946129 - 2⁴ = 697946113 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (697946149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 348973064 + 348973065.

It is an arithmetic number, because the mean of its divisors is an integer number (348973065).

Almost surely, 2^697946129 is an apocalyptic number.

It is an amenable number.

697946129 is a deficient number, since it is larger than the sum of its proper divisors (1).

697946129 is an equidigital number, since it uses as much as digits as its factorization.

697946129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1469664, while the sum is 53.

The square root of 697946129 is about 26418.6700838630. The cubic root of 697946129 is about 887.0347508974.

The spelling of 697946129 in words is "six hundred ninety-seven million, nine hundred forty-six thousand, one hundred twenty-nine".