90919151 has 4 divisors (see below), whose sum is σ = 90968592. Its totient is φ = 90869712.

The previous prime is 90919141. The next prime is 90919193. The reversal of 90919151 is 15191909.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15191909 = 179 ⋅84871.

It is a cyclic number.

It is not a de Polignac number, because 90919151 - 2¹⁴ = 90902767 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 (90919141) 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, 21851 + ... + 25676.

It is an arithmetic number, because the mean of its divisors is an integer number (22742148).

Almost surely, 2^90919151 is an apocalyptic number.

90919151 is a deficient number, since it is larger than the sum of its proper divisors (49441).

90919151 is a wasteful number, since it uses less digits than its factorization.

90919151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49440.

The product of its (nonzero) digits is 3645, while the sum is 35.

The square root of 90919151 is about 9535.1534334797. The cubic root of 90919151 is about 449.6608984406.

The spelling of 90919151 in words is "ninety million, nine hundred nineteen thousand, one hundred fifty-one".