131377501 has 2 divisors, whose sum is σ = 131377502. Its totient is φ = 131377500.

The previous prime is 131377429. The next prime is 131377517. The reversal of 131377501 is 105773131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 117202276 + 14175225 = 10826^2 + 3765^2 .

It is a cyclic number.

It is not a de Polignac number, because 131377501 - 2¹⁷ = 131246429 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 131377501.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131377531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65688750 + 65688751.

It is an arithmetic number, because the mean of its divisors is an integer number (65688751).

Almost surely, 2^131377501 is an apocalyptic number.

It is an amenable number.

131377501 is a deficient number, since it is larger than the sum of its proper divisors (1).

131377501 is an equidigital number, since it uses as much as digits as its factorization.

131377501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2205, while the sum is 28.

The square root of 131377501 is about 11462.0024864768. The cubic root of 131377501 is about 508.3626858502.

The spelling of 131377501 in words is "one hundred thirty-one million, three hundred seventy-seven thousand, five hundred one".