90251123 has 2 divisors, whose sum is σ = 90251124. Its totient is φ = 90251122.

The previous prime is 90251111. The next prime is 90251173. The reversal of 90251123 is 32115209.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 90251123 - 2⁴ = 90251107 is a prime.

It is a super-2 number, since 2×90251123² = 16290530405522258, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (90251173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45125561 + 45125562.

It is an arithmetic number, because the mean of its divisors is an integer number (45125562).

Almost surely, 2^90251123 is an apocalyptic number.

90251123 is a deficient number, since it is larger than the sum of its proper divisors (1).

90251123 is an equidigital number, since it uses as much as digits as its factorization.

90251123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 90251123 is about 9500.0591050793. The cubic root of 90251123 is about 448.5568964042.

It can be divided in two parts, 902 and 51123, that added together give a palindrome (52025).

The spelling of 90251123 in words is "ninety million, two hundred fifty-one thousand, one hundred twenty-three".