90771515 has 8 divisors (see below), whose sum is σ = 109320720. Its totient is φ = 72353952.

The previous prime is 90771511. The next prime is 90771589. The reversal of 90771515 is 51517709.

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

It is a cyclic number.

It is not a de Polignac number, because 90771515 - 2² = 90771511 is a prime.

It is not an unprimeable number, because it can be changed into a prime (90771511) 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, 31385 + ... + 34154.

It is an arithmetic number, because the mean of its divisors is an integer number (13665090).

Almost surely, 2^90771515 is an apocalyptic number.

90771515 is a deficient number, since it is larger than the sum of its proper divisors (18549205).

90771515 is a wasteful number, since it uses less digits than its factorization.

90771515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65821.

The product of its (nonzero) digits is 11025, while the sum is 35.

The square root of 90771515 is about 9527.4086193466. The cubic root of 90771515 is about 449.4173776822.

The spelling of 90771515 in words is "ninety million, seven hundred seventy-one thousand, five hundred fifteen".