691090130 has 32 divisors (see below), whose sum is σ = 1286489088. Its totient is φ = 267019200.

The previous prime is 691090129. The next prime is 691090133. The reversal of 691090130 is 31090196.

It is a junction number, because it is equal to n+sod(n) for n = 691090093 and 691090102.

It is not an unprimeable number, because it can be changed into a prime (691090133) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 193844 + ... + 197376.

It is an arithmetic number, because the mean of its divisors is an integer number (40202784).

Almost surely, 2^691090130 is an apocalyptic number.

691090130 is a deficient number, since it is larger than the sum of its proper divisors (595398958).

691090130 is a wasteful number, since it uses less digits than its factorization.

691090130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4202.

The product of its (nonzero) digits is 1458, while the sum is 29.

The square root of 691090130 is about 26288.5931536855. The cubic root of 691090130 is about 884.1207094435.

The spelling of 691090130 in words is "six hundred ninety-one million, ninety thousand, one hundred thirty".