90040501 has 4 divisors (see below), whose sum is σ = 90080172. Its totient is φ = 90000832.

The previous prime is 90040471. The next prime is 90040513. The reversal of 90040501 is 10504009.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10504009 = 31 ⋅338839.

It can be written as a sum of positive squares in 2 ways, for example, as 89283601 + 756900 = 9449^2 + 870^2 .

It is a cyclic number.

It is not a de Polignac number, because 90040501 - 2¹⁷ = 89909429 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 (90040571) 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, 16210 + ... + 21043.

It is an arithmetic number, because the mean of its divisors is an integer number (22520043).

Almost surely, 2^90040501 is an apocalyptic number.

It is an amenable number.

90040501 is a deficient number, since it is larger than the sum of its proper divisors (39671).

90040501 is a wasteful number, since it uses less digits than its factorization.

90040501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39670.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 90040501 is about 9488.9673305371. The cubic root of 90040501 is about 448.2076873056.

The spelling of 90040501 in words is "ninety million, forty thousand, five hundred one".