87150779 has 4 divisors (see below), whose sum is σ = 88013760. Its totient is φ = 86287800.

The previous prime is 87150757. The next prime is 87150793. The reversal of 87150779 is 97705178.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87150779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87155779) 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, 431339 + ... + 431540.

It is an arithmetic number, because the mean of its divisors is an integer number (22003440).

Almost surely, 2^87150779 is an apocalyptic number.

87150779 is a deficient number, since it is larger than the sum of its proper divisors (862981).

87150779 is a wasteful number, since it uses less digits than its factorization.

87150779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 862980.

The product of its (nonzero) digits is 123480, while the sum is 44.

The square root of 87150779 is about 9335.4581569412. The cubic root of 87150779 is about 443.3605948651.

The spelling of 87150779 in words is "eighty-seven million, one hundred fifty thousand, seven hundred seventy-nine".