87122023 has 4 divisors (see below), whose sum is σ = 87313120. Its totient is φ = 86930928.

The previous prime is 87121981. The next prime is 87122051. The reversal of 87122023 is 32022178.

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

It is a cyclic number.

It is not a de Polignac number, because 87122023 - 2¹⁷ = 86990951 is a prime.

It is a super-2 number, since 2×87122023² = 15180493783225058, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87122053) 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, 94863 + ... + 95776.

It is an arithmetic number, because the mean of its divisors is an integer number (21828280).

Almost surely, 2^87122023 is an apocalyptic number.

87122023 is a deficient number, since it is larger than the sum of its proper divisors (191097).

87122023 is a wasteful number, since it uses less digits than its factorization.

87122023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191096.

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 87122023 is about 9333.9178805044. The cubic root of 87122023 is about 443.3118262065.

The spelling of 87122023 in words is "eighty-seven million, one hundred twenty-two thousand, twenty-three".