87243995 has 4 divisors (see below), whose sum is σ = 104692800. Its totient is φ = 69795192.

The previous prime is 87243967. The next prime is 87244007. The reversal of 87243995 is 59934278.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 59934278 = 2 ⋅29967139.

It is a cyclic number.

It is not a de Polignac number, because 87243995 - 2⁶ = 87243931 is a prime.

It is a super-2 number, since 2×87243995² = 15223029327120050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8724395 + ... + 8724404.

It is an arithmetic number, because the mean of its divisors is an integer number (26173200).

Almost surely, 2^87243995 is an apocalyptic number.

87243995 is a deficient number, since it is larger than the sum of its proper divisors (17448805).

87243995 is a wasteful number, since it uses less digits than its factorization.

87243995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17448804.

The product of its digits is 544320, while the sum is 47.

The square root of 87243995 is about 9340.4494003233. The cubic root of 87243995 is about 443.5186105692.

The spelling of 87243995 in words is "eighty-seven million, two hundred forty-three thousand, nine hundred ninety-five".