87458137 has 4 divisors (see below), whose sum is σ = 94185700. Its totient is φ = 80730576.

The previous prime is 87458131. The next prime is 87458141. The reversal of 87458137 is 73185478.

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 29986576 + 57471561 = 5476^2 + 7581^2 .

It is a cyclic number.

It is not a de Polignac number, because 87458137 - 2⁷ = 87458009 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 87458093 and 87458102.

It is not an unprimeable number, because it can be changed into a prime (87458131) 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, 3363762 + ... + 3363787.

It is an arithmetic number, because the mean of its divisors is an integer number (23546425).

Almost surely, 2^87458137 is an apocalyptic number.

It is an amenable number.

87458137 is a deficient number, since it is larger than the sum of its proper divisors (6727563).

87458137 is a wasteful number, since it uses less digits than its factorization.

87458137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6727562.

The product of its digits is 188160, while the sum is 43.

The square root of 87458137 is about 9351.9055277521. The cubic root of 87458137 is about 443.8811889577.

The spelling of 87458137 in words is "eighty-seven million, four hundred fifty-eight thousand, one hundred thirty-seven".