697899643 has 4 divisors (see below), whose sum is σ = 797599600. Its totient is φ = 598199688.

The previous prime is 697899617. The next prime is 697899721. The reversal of 697899643 is 346998796.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 697899643 - 2⁹ = 697899131 is a prime.

It is not an unprimeable number, because it can be changed into a prime (697899343) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49849968 + ... + 49849981.

It is an arithmetic number, because the mean of its divisors is an integer number (199399900).

Almost surely, 2^697899643 is an apocalyptic number.

697899643 is a deficient number, since it is larger than the sum of its proper divisors (99699957).

697899643 is an equidigital number, since it uses as much as digits as its factorization.

697899643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99699956.

The product of its digits is 17635968, while the sum is 61.

The square root of 697899643 is about 26417.7902747372. The cubic root of 697899643 is about 887.0150571077.

The spelling of 697899643 in words is "six hundred ninety-seven million, eight hundred ninety-nine thousand, six hundred forty-three".