87798031 has 8 divisors (see below), whose sum is σ = 92519280. Its totient is φ = 83086848.

The previous prime is 87798017. The next prime is 87798037. The reversal of 87798031 is 13089778.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 87798031 - 2¹³ = 87789839 is a prime.

It is a super-2 number, since 2×87798031² = 15416988494953922, 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 (87798037) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21225 + ... + 25021.

It is an arithmetic number, because the mean of its divisors is an integer number (11564910).

Almost surely, 2^87798031 is an apocalyptic number.

87798031 is a deficient number, since it is larger than the sum of its proper divisors (4721249).

87798031 is a wasteful number, since it uses less digits than its factorization.

87798031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5033.

The product of its (nonzero) digits is 84672, while the sum is 43.

The square root of 87798031 is about 9370.0603519935. The cubic root of 87798031 is about 444.4554733351.

The spelling of 87798031 in words is "eighty-seven million, seven hundred ninety-eight thousand, thirty-one".