91347204169 has 27 divisors (see below), whose sum is σ = 100703005767. Its totient is φ = 82822609584.

The previous prime is 91347204131. The next prime is 91347204173. The reversal of 91347204169 is 96140274319.

The square root of 91347204169 is 302237.

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., 13512900025 + 77834304144 = 116245^2 + 278988^2 .

It is not a de Polignac number, because 91347204169 - 2¹⁹ = 91346679881 is a prime.

It is a super-2 number, since 2×91347204169² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (91347204119) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 263248254 + ... + 263248600.

Almost surely, 2^91347204169 is an apocalyptic number.

91347204169 is the 302237-th square number.

91347204169 is the 151119-th centered octagonal number.

It is an amenable number.

91347204169 is a deficient number, since it is larger than the sum of its proper divisors (9355801598).

91347204169 is an frugal number, since it uses more digits than its factorization.

91347204169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 854 (or 427 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 46.

The spelling of 91347204169 in words is "ninety-one billion, three hundred forty-seven million, two hundred four thousand, one hundred sixty-nine".