131994297 has 6 divisors (see below), whose sum is σ = 190658442. Its totient is φ = 87996192.

The previous prime is 131994257. The next prime is 131994323. The reversal of 131994297 is 792499131.

131994297 is a `hidden beast` number, since 131 + 99 + 429 + 7 = 666.

It can be written as a sum of positive squares in only one way, i.e., 130782096 + 1212201 = 11436^2 + 1101^2 .

It is not a de Polignac number, because 131994297 - 2⁷ = 131994169 is a prime.

It is not an unprimeable number, because it can be changed into a prime (131994257) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7333008 + ... + 7333025.

It is an arithmetic number, because the mean of its divisors is an integer number (31776407).

Almost surely, 2^131994297 is an apocalyptic number.

It is an amenable number.

131994297 is a deficient number, since it is larger than the sum of its proper divisors (58664145).

131994297 is a wasteful number, since it uses less digits than its factorization.

131994297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14666039 (or 14666036 counting only the distinct ones).

The product of its digits is 122472, while the sum is 45.

The square root of 131994297 is about 11488.8770991773. The cubic root of 131994297 is about 509.1570041224.

The spelling of 131994297 in words is "one hundred thirty-one million, nine hundred ninety-four thousand, two hundred ninety-seven".