87814993 has 4 divisors (see below), whose sum is σ = 100360000. Its totient is φ = 75269988.

The previous prime is 87814963. The next prime is 87814999. The reversal of 87814993 is 39941878.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87814993 is a prime.

It is a super-2 number, since 2×87814993² = 15422945991180098, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87814999) 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, 6272493 + ... + 6272506.

It is an arithmetic number, because the mean of its divisors is an integer number (25090000).

Almost surely, 2^87814993 is an apocalyptic number.

It is an amenable number.

87814993 is a deficient number, since it is larger than the sum of its proper divisors (12545007).

87814993 is a wasteful number, since it uses less digits than its factorization.

87814993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12545006.

The product of its digits is 435456, while the sum is 49.

The square root of 87814993 is about 9370.9654251843. The cubic root of 87814993 is about 444.4840934466.

The spelling of 87814993 in words is "eighty-seven million, eight hundred fourteen thousand, nine hundred ninety-three".