87049393 has 4 divisors (see below), whose sum is σ = 91630960. Its totient is φ = 82467828.

The previous prime is 87049363. The next prime is 87049397. The reversal of 87049393 is 39394078.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a de Polignac number, because none of the positive numbers 2^k-87049393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87049397) 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, 2290755 + ... + 2290792.

It is an arithmetic number, because the mean of its divisors is an integer number (22907740).

Almost surely, 2^87049393 is an apocalyptic number.

It is an amenable number.

87049393 is a deficient number, since it is larger than the sum of its proper divisors (4581567).

87049393 is a wasteful number, since it uses less digits than its factorization.

87049393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4581566.

The product of its (nonzero) digits is 163296, while the sum is 43.

The square root of 87049393 is about 9330.0264201126. The cubic root of 87049393 is about 443.1886017592.

The spelling of 87049393 in words is "eighty-seven million, forty-nine thousand, three hundred ninety-three".