87091415 has 4 divisors (see below), whose sum is σ = 104509704. Its totient is φ = 69673128.

The previous prime is 87091351. The next prime is 87091441. The reversal of 87091415 is 51419078.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 51419078 = 2 ⋅25709539.

It is a cyclic number.

It is not a de Polignac number, because 87091415 - 2⁶ = 87091351 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 8709137 + ... + 8709146.

It is an arithmetic number, because the mean of its divisors is an integer number (26127426).

Almost surely, 2^87091415 is an apocalyptic number.

87091415 is a deficient number, since it is larger than the sum of its proper divisors (17418289).

87091415 is a wasteful number, since it uses less digits than its factorization.

87091415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17418288.

The product of its (nonzero) digits is 10080, while the sum is 35.

The square root of 87091415 is about 9332.2781248739. The cubic root of 87091415 is about 443.2599048620.

The spelling of 87091415 in words is "eighty-seven million, ninety-one thousand, four hundred fifteen".