87347639 has 12 divisors (see below), whose sum is σ = 91159416. Its totient is φ = 83633472.

The previous prime is 87347621. The next prime is 87347641. The reversal of 87347639 is 93674378.

It is a happy number.

It is not a de Polignac number, because 87347639 - 2⁸ = 87347383 is a prime.

It is a super-2 number, since 2×87347639² = 15259220077748642, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 87347593 and 87347602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87346639) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 196952 + ... + 197394.

It is an arithmetic number, because the mean of its divisors is an integer number (7596618).

Almost surely, 2^87347639 is an apocalyptic number.

87347639 is a deficient number, since it is larger than the sum of its proper divisors (3811777).

87347639 is an equidigital number, since it uses as much as digits as its factorization.

87347639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 626 (or 553 counting only the distinct ones).

The product of its digits is 762048, while the sum is 47.

The square root of 87347639 is about 9345.9958805897. The cubic root of 87347639 is about 443.6941712744.

The spelling of 87347639 in words is "eighty-seven million, three hundred forty-seven thousand, six hundred thirty-nine".