90431401 has 4 divisors (see below), whose sum is σ = 90931204. Its totient is φ = 89931600.

The previous prime is 90431399. The next prime is 90431417. The reversal of 90431401 is 10413409.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10413409 = 2887 ⋅3607.

It can be written as a sum of positive squares in 2 ways, for example, as 3027600 + 87403801 = 1740^2 + 9349^2 .

It is a cyclic number.

It is not a de Polignac number, because 90431401 - 2¹ = 90431399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90431491) 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, 249630 + ... + 249991.

It is an arithmetic number, because the mean of its divisors is an integer number (22732801).

Almost surely, 2^90431401 is an apocalyptic number.

It is an amenable number.

90431401 is a deficient number, since it is larger than the sum of its proper divisors (499803).

90431401 is a wasteful number, since it uses less digits than its factorization.

90431401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 499802.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 90431401 is about 9509.5426283287. The cubic root of 90431401 is about 448.8553641838.

The spelling of 90431401 in words is "ninety million, four hundred thirty-one thousand, four hundred one".