91450969 has 9 divisors (see below), whose sum is σ = 93434079. Its totient is φ = 89509680.

The previous prime is 91450963. The next prime is 91450979. The reversal of 91450969 is 96905419.

The square root of 91450969 is 9563.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 51912025 + 39538944 = 7205^2 + 6288^2 .

It is not a de Polignac number, because 91450969 - 2²⁵ = 57896537 is a prime.

It is a super-2 number, since 2×91450969² = 16726559462077922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91450963) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 698034 + ... + 698164.

Almost surely, 2^91450969 is an apocalyptic number.

91450969 is the 9563-rd square number.

91450969 is the 4782-nd centered octagonal number.

It is an amenable number.

91450969 is a deficient number, since it is larger than the sum of its proper divisors (1983110).

91450969 is an frugal number, since it uses more digits than its factorization.

91450969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408 (or 204 counting only the distinct ones).

The product of its (nonzero) digits is 87480, while the sum is 43.

The cubic root of 91450969 is about 450.5359359492.

The spelling of 91450969 in words is "ninety-one million, four hundred fifty thousand, nine hundred sixty-nine".