131503873 has 2 divisors, whose sum is σ = 131503874. Its totient is φ = 131503872.

The previous prime is 131503871. The next prime is 131503877. The reversal of 131503873 is 378305131.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 130233744 + 1270129 = 11412^2 + 1127^2 .

It is a cyclic number.

It is not a de Polignac number, because 131503873 - 2¹ = 131503871 is a prime.

It is a super-2 number, since 2×131503873² = 34586537228000258, which contains 22 as substring.

Together with 131503871, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (131503871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65751936 + 65751937.

It is an arithmetic number, because the mean of its divisors is an integer number (65751937).

Almost surely, 2^131503873 is an apocalyptic number.

It is an amenable number.

131503873 is a deficient number, since it is larger than the sum of its proper divisors (1).

131503873 is an equidigital number, since it uses as much as digits as its factorization.

131503873 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 131503873 is about 11467.5138107612. The cubic root of 131503873 is about 508.5256316146.

The spelling of 131503873 in words is "one hundred thirty-one million, five hundred three thousand, eight hundred seventy-three".