90691375 has 8 divisors (see below), whose sum is σ = 113182992. Its totient is φ = 72553000.

The previous prime is 90691373. The next prime is 90691453. The reversal of 90691375 is 57319609.

It is not a de Polignac number, because 90691375 - 2¹ = 90691373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90691373) 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, 362641 + ... + 362890.

It is an arithmetic number, because the mean of its divisors is an integer number (14147874).

Almost surely, 2^90691375 is an apocalyptic number.

90691375 is a deficient number, since it is larger than the sum of its proper divisors (22491617).

90691375 is an equidigital number, since it uses as much as digits as its factorization.

90691375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 725546 (or 725536 counting only the distinct ones).

The product of its (nonzero) digits is 51030, while the sum is 40.

The square root of 90691375 is about 9523.2019300233. The cubic root of 90691375 is about 449.2850787881.

The spelling of 90691375 in words is "ninety million, six hundred ninety-one thousand, three hundred seventy-five".