195699131 has 2 divisors, whose sum is σ = 195699132. Its totient is φ = 195699130.

The previous prime is 195699103. The next prime is 195699137. The reversal of 195699131 is 131996591.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 195699131 - 2⁶ = 195699067 is a prime.

It is a super-2 number, since 2×195699131² = 76596299748310322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (195699137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97849565 + 97849566.

It is an arithmetic number, because the mean of its divisors is an integer number (97849566).

Almost surely, 2^195699131 is an apocalyptic number.

195699131 is a deficient number, since it is larger than the sum of its proper divisors (1).

195699131 is an equidigital number, since it uses as much as digits as its factorization.

195699131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 65610, while the sum is 44.

The square root of 195699131 is about 13989.2505517629. The cubic root of 195699131 is about 580.5811960475.

The spelling of 195699131 in words is "one hundred ninety-five million, six hundred ninety-nine thousand, one hundred thirty-one".