531872137 has 2 divisors, whose sum is σ = 531872138. Its totient is φ = 531872136.

The previous prime is 531872113. The next prime is 531872141. The reversal of 531872137 is 731278135.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 496576656 + 35295481 = 22284^2 + 5941^2 .

It is a cyclic number.

It is not a de Polignac number, because 531872137 - 2¹¹ = 531870089 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 531872096 and 531872105.

It is not a weakly prime, because it can be changed into another prime (531872167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265936068 + 265936069.

It is an arithmetic number, because the mean of its divisors is an integer number (265936069).

Almost surely, 2^531872137 is an apocalyptic number.

It is an amenable number.

531872137 is a deficient number, since it is larger than the sum of its proper divisors (1).

531872137 is an equidigital number, since it uses as much as digits as its factorization.

531872137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 35280, while the sum is 37.

The square root of 531872137 is about 23062.3532407255. The cubic root of 531872137 is about 810.2189810824.

The spelling of 531872137 in words is "five hundred thirty-one million, eight hundred seventy-two thousand, one hundred thirty-seven".