90418771 has 4 divisors (see below), whose sum is σ = 90651600. Its totient is φ = 90185944.

The previous prime is 90418753. The next prime is 90418799. The reversal of 90418771 is 17781409.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17781409 = 577 ⋅30817.

It is a cyclic number.

It is not a de Polignac number, because 90418771 - 2¹¹ = 90416723 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 90418771.

It is not an unprimeable number, because it can be changed into a prime (90418721) 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, 115831 + ... + 116608.

It is an arithmetic number, because the mean of its divisors is an integer number (22662900).

Almost surely, 2^90418771 is an apocalyptic number.

90418771 is a deficient number, since it is larger than the sum of its proper divisors (232829).

90418771 is a wasteful number, since it uses less digits than its factorization.

90418771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232828.

The product of its (nonzero) digits is 14112, while the sum is 37.

The square root of 90418771 is about 9508.8785353479. The cubic root of 90418771 is about 448.8344669175.

It can be divided in two parts, 9041877 and 1, that added together give a triangular number (9041878 = T₄₂₅₂).

The spelling of 90418771 in words is "ninety million, four hundred eighteen thousand, seven hundred seventy-one".