87390969 has 8 divisors (see below), whose sum is σ = 117830880. Its totient is φ = 57605856.

The previous prime is 87390959. The next prime is 87390991. The reversal of 87390969 is 96909378.

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

It is not a de Polignac number, because 87390969 - 2¹³ = 87382777 is a prime.

It is a super-2 number, since 2×87390969² = 15274362925517922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (87390959) 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, 163387 + ... + 163920.

It is an arithmetic number, because the mean of its divisors is an integer number (14728860).

Almost surely, 2^87390969 is an apocalyptic number.

87390969 is a gapful number since it is divisible by the number (89) formed by its first and last digit.

It is an amenable number.

87390969 is a deficient number, since it is larger than the sum of its proper divisors (30439911).

87390969 is a wasteful number, since it uses less digits than its factorization.

87390969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327399.

The product of its (nonzero) digits is 734832, while the sum is 51.

The square root of 87390969 is about 9348.3136982025. The cubic root of 87390969 is about 443.7675260155.

The spelling of 87390969 in words is "eighty-seven million, three hundred ninety thousand, nine hundred sixty-nine".