691498412 has 12 divisors (see below), whose sum is σ = 1320133416. Its totient is φ = 314317440.

The previous prime is 691498399. The next prime is 691498429. The reversal of 691498412 is 214894196.

It is a Harshad number since it is a multiple of its sum of digits (44), and also a Moran number because the ratio is a prime number: 15715873 = 691498412 / (6 + 9 + 1 + 4 + 9 + 8 + 4 + 1 + 2).

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 7857893 + ... + 7857980.

It is an arithmetic number, because the mean of its divisors is an integer number (110011118).

Almost surely, 2^691498412 is an apocalyptic number.

It is an amenable number.

691498412 is a deficient number, since it is larger than the sum of its proper divisors (628635004).

691498412 is a wasteful number, since it uses less digits than its factorization.

691498412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15715888 (or 15715886 counting only the distinct ones).

The product of its digits is 124416, while the sum is 44.

The square root of 691498412 is about 26296.3573903307. The cubic root of 691498412 is about 884.2947820159.

The spelling of 691498412 in words is "six hundred ninety-one million, four hundred ninety-eight thousand, four hundred twelve".