87990411 has 4 divisors (see below), whose sum is σ = 117320552. Its totient is φ = 58660272.

The previous prime is 87990401. The next prime is 87990443. The reversal of 87990411 is 11409978.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 87990411 - 2¹⁷ = 87859339 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 87990411.

It is not an unprimeable number, because it can be changed into a prime (87990401) 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 3 ways as a sum of consecutive naturals, for example, 14665066 + ... + 14665071.

It is an arithmetic number, because the mean of its divisors is an integer number (29330138).

Almost surely, 2^87990411 is an apocalyptic number.

87990411 is a deficient number, since it is larger than the sum of its proper divisors (29330141).

87990411 is a wasteful number, since it uses less digits than its factorization.

87990411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29330140.

The product of its (nonzero) digits is 18144, while the sum is 39.

The square root of 87990411 is about 9380.3204103058. The cubic root of 87990411 is about 444.7798616595.

The spelling of 87990411 in words is "eighty-seven million, nine hundred ninety thousand, four hundred eleven".