131969690 has 16 divisors (see below), whose sum is σ = 239005728. Its totient is φ = 52463376.

The previous prime is 131969681. The next prime is 131969701. The reversal of 131969690 is 96969131.

It is a happy number.

It is a super-2 number, since 2×131969690² = 34831998157392200, which contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 38852 + ... + 42111.

It is an arithmetic number, because the mean of its divisors is an integer number (14937858).

Almost surely, 2^131969690 is an apocalyptic number.

131969690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

131969690 is a deficient number, since it is larger than the sum of its proper divisors (107036038).

131969690 is a wasteful number, since it uses less digits than its factorization.

131969690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81133.

The product of its (nonzero) digits is 78732, while the sum is 44.

The square root of 131969690 is about 11487.8061439075. The cubic root of 131969690 is about 509.1253623386.

The spelling of 131969690 in words is "one hundred thirty-one million, nine hundred sixty-nine thousand, six hundred ninety".