87377551 has 4 divisors (see below), whose sum is σ = 90390600. Its totient is φ = 84364504.

The previous prime is 87377513. The next prime is 87377579. The reversal of 87377551 is 15577378.

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

It is a cyclic number.

It is not a de Polignac number, because 87377551 - 2¹⁷ = 87246479 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 87377498 and 87377507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87317551) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1506481 + ... + 1506538.

It is an arithmetic number, because the mean of its divisors is an integer number (22597650).

Almost surely, 2^87377551 is an apocalyptic number.

87377551 is a deficient number, since it is larger than the sum of its proper divisors (3013049).

87377551 is a wasteful number, since it uses less digits than its factorization.

87377551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3013048.

The product of its digits is 205800, while the sum is 43.

The square root of 87377551 is about 9347.5960011117. The cubic root of 87377551 is about 443.7448128469.

The spelling of 87377551 in words is "eighty-seven million, three hundred seventy-seven thousand, five hundred fifty-one".