87453913 has 4 divisors (see below), whose sum is σ = 87587280. Its totient is φ = 87320548.

The previous prime is 87453907. The next prime is 87453923. The reversal of 87453913 is 31935478.

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, and also an emirpimes, since its reverse is a distinct semiprime: 31935478 = 2 ⋅15967739.

It is a cyclic number.

It is not a de Polignac number, because 87453913 - 2⁵ = 87453881 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87453923) 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, 65695 + ... + 67012.

It is an arithmetic number, because the mean of its divisors is an integer number (21896820).

Almost surely, 2^87453913 is an apocalyptic number.

It is an amenable number.

87453913 is a deficient number, since it is larger than the sum of its proper divisors (133367).

87453913 is a wasteful number, since it uses less digits than its factorization.

87453913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133366.

The product of its digits is 90720, while the sum is 40.

The square root of 87453913 is about 9351.6796886976. The cubic root of 87453913 is about 443.8740427412.

The spelling of 87453913 in words is "eighty-seven million, four hundred fifty-three thousand, nine hundred thirteen".