697899479 has 2 divisors, whose sum is σ = 697899480. Its totient is φ = 697899478.

The previous prime is 697899467. The next prime is 697899493. The reversal of 697899479 is 974998796.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-697899479 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (697899409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 348949739 + 348949740.

It is an arithmetic number, because the mean of its divisors is an integer number (348949740).

Almost surely, 2^697899479 is an apocalyptic number.

697899479 is a deficient number, since it is larger than the sum of its proper divisors (1).

697899479 is an equidigital number, since it uses as much as digits as its factorization.

697899479 is an evil number, because the sum of its binary digits is even.

The product of its digits is 61725888, while the sum is 68.

The square root of 697899479 is about 26417.7871707681. The cubic root of 697899479 is about 887.0149876276.

The spelling of 697899479 in words is "six hundred ninety-seven million, eight hundred ninety-nine thousand, four hundred seventy-nine".