131121953 has 2 divisors, whose sum is σ = 131121954. Its totient is φ = 131121952.

The previous prime is 131121929. The next prime is 131121959. The reversal of 131121953 is 359121131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 119946304 + 11175649 = 10952^2 + 3343^2 .

It is an emirp because it is prime and its reverse (359121131) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131121953 is a prime.

It is not a weakly prime, because it can be changed into another prime (131121959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65560976 + 65560977.

It is an arithmetic number, because the mean of its divisors is an integer number (65560977).

Almost surely, 2^131121953 is an apocalyptic number.

It is an amenable number.

131121953 is a deficient number, since it is larger than the sum of its proper divisors (1).

131121953 is an equidigital number, since it uses as much as digits as its factorization.

131121953 is an evil number, because the sum of its binary digits is even.

The product of its digits is 810, while the sum is 26.

The square root of 131121953 is about 11450.8494444735. The cubic root of 131121953 is about 508.0328592319.

The spelling of 131121953 in words is "one hundred thirty-one million, one hundred twenty-one thousand, nine hundred fifty-three".