87390423 has 12 divisors (see below), whose sum is σ = 127390120. Its totient is φ = 57725136.

The previous prime is 87390389. The next prime is 87390449. The reversal of 87390423 is 32409378.

It is not a de Polignac number, because 87390423 - 2¹⁰ = 87389399 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87390463) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 43561 + ... + 45522.

Almost surely, 2^87390423 is an apocalyptic number.

87390423 is a deficient number, since it is larger than the sum of its proper divisors (39999697).

87390423 is a wasteful number, since it uses less digits than its factorization.

87390423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89198 (or 89195 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 87390423 is about 9348.2844950290. The cubic root of 87390423 is about 443.7666018255.

The spelling of 87390423 in words is "eighty-seven million, three hundred ninety thousand, four hundred twenty-three".