87420023 has 4 divisors (see below), whose sum is σ = 87441528. Its totient is φ = 87398520.

The previous prime is 87420017. The next prime is 87420049. The reversal of 87420023 is 32002478.

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 87420023 - 2¹⁰ = 87418999 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 87419974 and 87420001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87720023) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 2588 + ... + 13473.

It is an arithmetic number, because the mean of its divisors is an integer number (21860382).

Almost surely, 2^87420023 is an apocalyptic number.

87420023 is a deficient number, since it is larger than the sum of its proper divisors (21505).

87420023 is a wasteful number, since it uses less digits than its factorization.

87420023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21504.

The product of its (nonzero) digits is 2688, while the sum is 26.

The square root of 87420023 is about 9349.8675391687. The cubic root of 87420023 is about 443.8166988811.

The spelling of 87420023 in words is "eighty-seven million, four hundred twenty thousand, twenty-three".