699421640 has 16 divisors (see below), whose sum is σ = 1573698780. Its totient is φ = 279768640.

The previous prime is 699421631. The next prime is 699421663. The reversal of 699421640 is 46124996.

It can be written as a sum of positive squares in 2 ways, for example, as 695587876 + 3833764 = 26374^2 + 1958^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8742731 + ... + 8742810.

Almost surely, 2^699421640 is an apocalyptic number.

It is an amenable number.

699421640 is an abundant number, since it is smaller than the sum of its proper divisors (874277140).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

699421640 is a wasteful number, since it uses less digits than its factorization.

699421640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17485552 (or 17485548 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 41.

The square root of 699421640 is about 26446.5808754175. The cubic root of 699421640 is about 887.6593971455.

The spelling of 699421640 in words is "six hundred ninety-nine million, four hundred twenty-one thousand, six hundred forty".