87645934 has 4 divisors (see below), whose sum is σ = 131468904. Its totient is φ = 43822966.

The previous prime is 87645907. The next prime is 87645953. The reversal of 87645934 is 43954678.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 43954678 = 2 ⋅21977339.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21911482 + ... + 21911485.

It is an arithmetic number, because the mean of its divisors is an integer number (32867226).

Almost surely, 2^87645934 is an apocalyptic number.

87645934 is a deficient number, since it is larger than the sum of its proper divisors (43822970).

87645934 is a wasteful number, since it uses less digits than its factorization.

87645934 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43822969.

The product of its digits is 725760, while the sum is 46.

The square root of 87645934 is about 9361.9407176076. The cubic root of 87645934 is about 444.1986740394.

The spelling of 87645934 in words is "eighty-seven million, six hundred forty-five thousand, nine hundred thirty-four".