680998995 has 36 divisors (see below), whose sum is σ = 1225794960. Its totient is φ = 363181968.

The previous prime is 680998991. The next prime is 680998999. The reversal of 680998995 is 599899086.

It is an interprime number because it is at equal distance from previous prime (680998991) and next prime (680998999).

It is not a de Polignac number, because 680998995 - 2² = 680998991 is a prime.

It is not an unprimeable number, because it can be changed into a prime (680998991) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 22426 + ... + 43184.

It is an arithmetic number, because the mean of its divisors is an integer number (34049860).

Almost surely, 2^680998995 is an apocalyptic number.

680998995 is a deficient number, since it is larger than the sum of its proper divisors (544795965).

680998995 is an frugal number, since it uses more digits than its factorization.

680998995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20788 (or 20767 counting only the distinct ones).

The product of its (nonzero) digits is 12597120, while the sum is 63.

The square root of 680998995 is about 26095.9574455508. The cubic root of 680998995 is about 879.7963522388.

The spelling of 680998995 in words is "six hundred eighty million, nine hundred ninety-eight thousand, nine hundred ninety-five".