87624397 has 6 divisors (see below), whose sum is σ = 101930478. Its totient is φ = 75106584.

The previous prime is 87624391. The next prime is 87624413. The reversal of 87624397 is 79342678.

It can be written as a sum of positive squares in only one way, i.e., 44970436 + 42653961 = 6706^2 + 6531^2 .

It is not a de Polignac number, because 87624397 - 2³ = 87624389 is a prime.

It is a super-2 number, since 2×87624397² = 15356069899227218, 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 (87624391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 894078 + ... + 894175.

It is an arithmetic number, because the mean of its divisors is an integer number (16988413).

Almost surely, 2^87624397 is an apocalyptic number.

It is an amenable number.

87624397 is a deficient number, since it is larger than the sum of its proper divisors (14306081).

87624397 is a wasteful number, since it uses less digits than its factorization.

87624397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1788267 (or 1788260 counting only the distinct ones).

The product of its digits is 508032, while the sum is 46.

The square root of 87624397 is about 9360.7904046613. The cubic root of 87624397 is about 444.1622871430.

The spelling of 87624397 in words is "eighty-seven million, six hundred twenty-four thousand, three hundred ninety-seven".