85190537 has 2 divisors, whose sum is σ = 85190538. Its totient is φ = 85190536.

The previous prime is 85190503. The next prime is 85190561. The reversal of 85190537 is 73509158.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49716601 + 35473936 = 7051^2 + 5956^2 .

It is a cyclic number.

It is not a de Polignac number, because 85190537 - 2¹² = 85186441 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 85190537.

It is not a weakly prime, because it can be changed into another prime (85190437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42595268 + 42595269.

It is an arithmetic number, because the mean of its divisors is an integer number (42595269).

Almost surely, 2^85190537 is an apocalyptic number.

It is an amenable number.

85190537 is a deficient number, since it is larger than the sum of its proper divisors (1).

85190537 is an equidigital number, since it uses as much as digits as its factorization.

85190537 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 37800, while the sum is 38.

The square root of 85190537 is about 9229.8719926118. The cubic root of 85190537 is about 440.0112548774.

The spelling of 85190537 in words is "eighty-five million, one hundred ninety thousand, five hundred thirty-seven".