80618887 has 4 divisors (see below), whose sum is σ = 84124080. Its totient is φ = 77113696.

The previous prime is 80618861. The next prime is 80618891. The reversal of 80618887 is 78881608.

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-80618887 is a prime.

It is a super-2 number, since 2×80618887² = 12998809882237538, 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 (80618807) 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, 1752562 + ... + 1752607.

It is an arithmetic number, because the mean of its divisors is an integer number (21031020).

Almost surely, 2^80618887 is an apocalyptic number.

80618887 is a deficient number, since it is larger than the sum of its proper divisors (3505193).

80618887 is a wasteful number, since it uses less digits than its factorization.

80618887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3505192.

The product of its (nonzero) digits is 172032, while the sum is 46.

The square root of 80618887 is about 8978.8020915933. The cubic root of 80618887 is about 431.9952113524.

The spelling of 80618887 in words is "eighty million, six hundred eighteen thousand, eight hundred eighty-seven".