131213933 has 2 divisors, whose sum is σ = 131213934. Its totient is φ = 131213932.

The previous prime is 131213861. The next prime is 131213963. The reversal of 131213933 is 339312131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 84400969 + 46812964 = 9187^2 + 6842^2 .

It is an emirp because it is prime and its reverse (339312131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 131213933 - 2¹⁸ = 130951789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131213963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65606966 + 65606967.

It is an arithmetic number, because the mean of its divisors is an integer number (65606967).

Almost surely, 2^131213933 is an apocalyptic number.

It is an amenable number.

131213933 is a deficient number, since it is larger than the sum of its proper divisors (1).

131213933 is an equidigital number, since it uses as much as digits as its factorization.

131213933 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1458, while the sum is 26.

The square root of 131213933 is about 11454.8650363066. The cubic root of 131213933 is about 508.1516238350.

The spelling of 131213933 in words is "one hundred thirty-one million, two hundred thirteen thousand, nine hundred thirty-three".