691730130 has 64 divisors (see below), whose sum is σ = 2043272448. Its totient is φ = 145946880.

The previous prime is 691730107. The next prime is 691730141. The reversal of 691730130 is 31037196.

It is a Harshad number since it is a multiple of its sum of digits (30).

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 31 ways as a sum of consecutive naturals, for example, 123961 + ... + 129420.

It is an arithmetic number, because the mean of its divisors is an integer number (31926132).

Almost surely, 2^691730130 is an apocalyptic number.

691730130 is an abundant number, since it is smaller than the sum of its proper divisors (1351542318).

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

691730130 is a wasteful number, since it uses less digits than its factorization.

691730130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253411.

The product of its (nonzero) digits is 3402, while the sum is 30.

The square root of 691730130 is about 26300.7629166912. The cubic root of 691730130 is about 884.3935453831.

The spelling of 691730130 in words is "six hundred ninety-one million, seven hundred thirty thousand, one hundred thirty".