90751469 has 12 divisors (see below), whose sum is σ = 95558580. Its totient is φ = 86185680.

The previous prime is 90751447. The next prime is 90751471. The reversal of 90751469 is 96415709.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 6 ways, for example, as 60918025 + 29833444 = 7805^2 + 5462^2 .

It is a de Polignac number, because none of the positive numbers 2^k-90751469 is a prime.

It is a super-2 number, since 2×90751469² = 16471658251315922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90751489) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1487699 + ... + 1487759.

It is an arithmetic number, because the mean of its divisors is an integer number (7963215).

Almost surely, 2^90751469 is an apocalyptic number.

It is an amenable number.

90751469 is a deficient number, since it is larger than the sum of its proper divisors (4807111).

90751469 is an frugal number, since it uses more digits than its factorization.

90751469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209 (or 90 counting only the distinct ones).

The product of its (nonzero) digits is 68040, while the sum is 41.

The square root of 90751469 is about 9526.3565438209. The cubic root of 90751469 is about 449.3842921046.

The spelling of 90751469 in words is "ninety million, seven hundred fifty-one thousand, four hundred sixty-nine".