87423645 has 16 divisors (see below), whose sum is σ = 140038272. Its totient is φ = 46572480.

The previous prime is 87423641. The next prime is 87423653. The reversal of 87423645 is 54632478.

It is a happy number.

It is not a de Polignac number, because 87423645 - 2² = 87423641 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87423641) 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 15 ways as a sum of consecutive naturals, for example, 12639 + ... + 18291.

It is an arithmetic number, because the mean of its divisors is an integer number (8752392).

Almost surely, 2^87423645 is an apocalyptic number.

It is an amenable number.

87423645 is a deficient number, since it is larger than the sum of its proper divisors (52614627).

87423645 is a wasteful number, since it uses less digits than its factorization.

87423645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6692.

The product of its digits is 161280, while the sum is 39.

The square root of 87423645 is about 9350.0612297460. The cubic root of 87423645 is about 443.8228282240.

The spelling of 87423645 in words is "eighty-seven million, four hundred twenty-three thousand, six hundred forty-five".