90249489 has 24 divisors (see below), whose sum is σ = 142545312. Its totient is φ = 54568320.

The previous prime is 90249457. The next prime is 90249491. The reversal of 90249489 is 98494209.

It is not a de Polignac number, because 90249489 - 2⁵ = 90249457 is a prime.

It is a super-2 number, since 2×90249489² = 16289940529522242, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (90249499) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 57337 + ... + 58889.

It is an arithmetic number, because the mean of its divisors is an integer number (5939388).

Almost surely, 2^90249489 is an apocalyptic number.

90249489 is a gapful number since it is divisible by the number (99) formed by its first and last digit.

It is an amenable number.

90249489 is a deficient number, since it is larger than the sum of its proper divisors (52295823).

90249489 is a wasteful number, since it uses less digits than its factorization.

90249489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2157 (or 2154 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 45.

The square root of 90249489 is about 9499.9731052251. The cubic root of 90249489 is about 448.5541893413.

The spelling of 90249489 in words is "ninety million, two hundred forty-nine thousand, four hundred eighty-nine".