91377430369 has 3 divisors (see below), whose sum is σ = 91377732657. Its totient is φ = 91377128082.

The previous prime is 91377430357. The next prime is 91377430373. The reversal of 91377430369 is 96303477319.

The square root of 91377430369 is 302287.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 91377430369 - 2⁷ = 91377430241 is a prime.

It is a super-2 number, since 2×91377430369² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91377430069) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 151144 + ... + 453430.

It is an arithmetic number, because the mean of its divisors is an integer number (30459244219).

Almost surely, 2^91377430369 is an apocalyptic number.

91377430369 is the 302287-th square number.

91377430369 is the 151144-th centered octagonal number.

It is an amenable number.

91377430369 is a deficient number, since it is larger than the sum of its proper divisors (302288).

91377430369 is an frugal number, since it uses more digits than its factorization.

91377430369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 604574 (or 302287 counting only the distinct ones).

The product of its (nonzero) digits is 2571912, while the sum is 52.

The spelling of 91377430369 in words is "ninety-one billion, three hundred seventy-seven million, four hundred thirty thousand, three hundred sixty-nine".