87615901 has 4 divisors (see below), whose sum is σ = 91425312. Its totient is φ = 83806492.

The previous prime is 87615883. The next prime is 87615907. The reversal of 87615901 is 10951678.

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, and also an emirpimes, since its reverse is a distinct semiprime: 10951678 = 2 ⋅5475839.

It is a cyclic number.

It is not a de Polignac number, because 87615901 - 2⁹ = 87615389 is a prime.

It is a super-2 number, since 2×87615901² = 15353092216083602, 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 (87615907) 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, 1904671 + ... + 1904716.

It is an arithmetic number, because the mean of its divisors is an integer number (22856328).

Almost surely, 2^87615901 is an apocalyptic number.

It is an amenable number.

87615901 is a deficient number, since it is larger than the sum of its proper divisors (3809411).

87615901 is a wasteful number, since it uses less digits than its factorization.

87615901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3809410.

The product of its (nonzero) digits is 15120, while the sum is 37.

The square root of 87615901 is about 9360.3365858285. The cubic root of 87615901 is about 444.1479314579.

The spelling of 87615901 in words is "eighty-seven million, six hundred fifteen thousand, nine hundred one".