131951173 has 2 divisors, whose sum is σ = 131951174. Its totient is φ = 131951172.

The previous prime is 131951123. The next prime is 131951177. The reversal of 131951173 is 371159131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 131951169 + 4 = 11487^2 + 2^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131951173 is a prime.

It is a super-2 number, since 2×131951173² = 34822224112151858, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131951177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65975586 + 65975587.

It is an arithmetic number, because the mean of its divisors is an integer number (65975587).

Almost surely, 2^131951173 is an apocalyptic number.

It is an amenable number.

131951173 is a deficient number, since it is larger than the sum of its proper divisors (1).

131951173 is an equidigital number, since it uses as much as digits as its factorization.

131951173 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2835, while the sum is 31.

The square root of 131951173 is about 11487.0001741099. Note that the first 3 decimals coincide. The cubic root of 131951173 is about 509.1015490036.

The spelling of 131951173 in words is "one hundred thirty-one million, nine hundred fifty-one thousand, one hundred seventy-three".