87602391 has 20 divisors (see below), whose sum is σ = 131138832. Its totient is φ = 58278528.

The previous prime is 87602381. The next prime is 87602413. The reversal of 87602391 is 19320678.

It is not a de Polignac number, because 87602391 - 2⁶ = 87602327 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87602351) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 53710 + ... + 55316.

Almost surely, 2^87602391 is an apocalyptic number.

87602391 is a gapful number since it is divisible by the number (81) formed by its first and last digit.

87602391 is a deficient number, since it is larger than the sum of its proper divisors (43536441).

87602391 is a wasteful number, since it uses less digits than its factorization.

87602391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2292 (or 2283 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 87602391 is about 9359.6148959239. The cubic root of 87602391 is about 444.1251017092.

The spelling of 87602391 in words is "eighty-seven million, six hundred two thousand, three hundred ninety-one".