699618491 has 12 divisors (see below), whose sum is σ = 828158016. Its totient is φ = 587091120.

The previous prime is 699618467. The next prime is 699618499. The reversal of 699618491 is 194816996.

It is a happy number.

It is not a de Polignac number, because 699618491 - 2⁶ = 699618427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (699618499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 220811 + ... + 223956.

It is an arithmetic number, because the mean of its divisors is an integer number (69013168).

Almost surely, 2^699618491 is an apocalyptic number.

699618491 is a deficient number, since it is larger than the sum of its proper divisors (128539525).

699618491 is a wasteful number, since it uses less digits than its factorization.

699618491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444802 (or 444791 counting only the distinct ones).

The product of its digits is 839808, while the sum is 53.

The square root of 699618491 is about 26450.3022856072. The cubic root of 699618491 is about 887.7426660634.

The spelling of 699618491 in words is "six hundred ninety-nine million, six hundred eighteen thousand, four hundred ninety-one".