85499137 has 4 divisors (see below), whose sum is σ = 90528516. Its totient is φ = 80469760.

The previous prime is 85499131. The next prime is 85499149. The reversal of 85499137 is 73199458.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 24049216 + 61449921 = 4904^2 + 7839^2 .

It is a cyclic number.

It is not a de Polignac number, because 85499137 - 2³ = 85499129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85499131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2514664 + ... + 2514697.

It is an arithmetic number, because the mean of its divisors is an integer number (22632129).

Almost surely, 2^85499137 is an apocalyptic number.

It is an amenable number.

85499137 is a deficient number, since it is larger than the sum of its proper divisors (5029379).

85499137 is a wasteful number, since it uses less digits than its factorization.

85499137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5029378.

The product of its digits is 272160, while the sum is 46.

The square root of 85499137 is about 9246.5743386402. The cubic root of 85499137 is about 440.5419235224.

The spelling of 85499137 in words is "eighty-five million, four hundred ninety-nine thousand, one hundred thirty-seven".