87377581 has 8 divisors (see below), whose sum is σ = 89004384. Its totient is φ = 85760400.

The previous prime is 87377579. The next prime is 87377657. The reversal of 87377581 is 18577378.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 87377581 - 2¹ = 87377579 is a prime.

It is a super-2 number, since 2×87377581² = 15269683322823122, 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 (87377281) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17406 + ... + 21856.

It is an arithmetic number, because the mean of its divisors is an integer number (11125548).

Almost surely, 2^87377581 is an apocalyptic number.

It is an amenable number.

87377581 is a deficient number, since it is larger than the sum of its proper divisors (1626803).

87377581 is a wasteful number, since it uses less digits than its factorization.

87377581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4811.

The product of its digits is 329280, while the sum is 46.

The square root of 87377581 is about 9347.5976058023. The cubic root of 87377581 is about 443.7448636316.

The spelling of 87377581 in words is "eighty-seven million, three hundred seventy-seven thousand, five hundred eighty-one".