990591453 has 24 divisors (see below), whose sum is σ = 1483612416. Its totient is φ = 636235200.

The previous prime is 990591443. The next prime is 990591463. The reversal of 990591453 is 354195099.

It is a happy number.

990591453 is a `hidden beast` number, since 9 + 9 + 0 + 591 + 4 + 53 = 666.

It is an interprime number because it is at equal distance from previous prime (990591443) and next prime (990591463).

It is not a de Polignac number, because 990591453 - 2⁸ = 990591197 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 990591399 and 990591408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (990591443) 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, 55513 + ... + 71153.

It is an arithmetic number, because the mean of its divisors is an integer number (61817184).

Almost surely, 2^990591453 is an apocalyptic number.

990591453 is a gapful number since it is divisible by the number (93) formed by its first and last digit.

It is an amenable number.

990591453 is a deficient number, since it is larger than the sum of its proper divisors (493020963).

990591453 is a wasteful number, since it uses less digits than its factorization.

990591453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15905 (or 15902 counting only the distinct ones).

The product of its (nonzero) digits is 218700, while the sum is 45.

The square root of 990591453 is about 31473.6628468947. The cubic root of 990591453 is about 996.8539302917.

The spelling of 990591453 in words is "nine hundred ninety million, five hundred ninety-one thousand, four hundred fifty-three".