90491401 has 16 divisors (see below), whose sum is σ = 121500288. Its totient is φ = 65088000.

The previous prime is 90491399. The next prime is 90491461. The reversal of 90491401 is 10419409.

It is a cyclic number.

It is not a de Polignac number, because 90491401 - 2¹ = 90491399 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 90491401.

It is not an unprimeable number, because it can be changed into a prime (90491461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44200 + ... + 46201.

It is an arithmetic number, because the mean of its divisors is an integer number (7593768).

Almost surely, 2^90491401 is an apocalyptic number.

90491401 is a gapful number since it is divisible by the number (91) formed by its first and last digit.

It is an amenable number.

90491401 is a deficient number, since it is larger than the sum of its proper divisors (31008887).

90491401 is a wasteful number, since it uses less digits than its factorization.

90491401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90432.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 90491401 is about 9512.6968310779. The cubic root of 90491401 is about 448.9546120393.

The spelling of 90491401 in words is "ninety million, four hundred ninety-one thousand, four hundred one".