90135961 has 4 divisors (see below), whose sum is σ = 90215424. Its totient is φ = 90056500.

The previous prime is 90135953. The next prime is 90135967. The reversal of 90135961 is 16953109.

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.

It is a cyclic number.

It is not a de Polignac number, because 90135961 - 2³ = 90135953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90135967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38005 + ... + 40306.

It is an arithmetic number, because the mean of its divisors is an integer number (22553856).

Almost surely, 2^90135961 is an apocalyptic number.

It is an amenable number.

90135961 is a deficient number, since it is larger than the sum of its proper divisors (79463).

90135961 is a wasteful number, since it uses less digits than its factorization.

90135961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79462.

The product of its (nonzero) digits is 7290, while the sum is 34.

The square root of 90135961 is about 9493.9960501361. The cubic root of 90135961 is about 448.3660264006.

The spelling of 90135961 in words is "ninety million, one hundred thirty-five thousand, nine hundred sixty-one".