87404397 has 8 divisors (see below), whose sum is σ = 119689056. Its totient is φ = 56694672.

The previous prime is 87404377. The next prime is 87404417. The reversal of 87404397 is 79340478.

It is an interprime number because it is at equal distance from previous prime (87404377) and next prime (87404417).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 87404397 - 2⁷ = 87404269 is a prime.

It is a super-2 number, since 2×87404397² = 15279057229867218, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87404377) 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 7 ways as a sum of consecutive naturals, for example, 393603 + ... + 393824.

It is an arithmetic number, because the mean of its divisors is an integer number (14961132).

Almost surely, 2^87404397 is an apocalyptic number.

It is an amenable number.

87404397 is a deficient number, since it is larger than the sum of its proper divisors (32284659).

87404397 is a wasteful number, since it uses less digits than its factorization.

87404397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 787467.

The product of its (nonzero) digits is 169344, while the sum is 42.

The square root of 87404397 is about 9349.0318750125. The cubic root of 87404397 is about 443.7902537841.

The spelling of 87404397 in words is "eighty-seven million, four hundred four thousand, three hundred ninety-seven".