91350399 has 16 divisors (see below), whose sum is σ = 139606272. Its totient is φ = 52048128.

The previous prime is 91350331. The next prime is 91350403. The reversal of 91350399 is 99305319.

It is not a de Polignac number, because 91350399 - 2¹⁵ = 91317631 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91350199) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1252 + ... + 13574.

It is an arithmetic number, because the mean of its divisors is an integer number (8725392).

Almost surely, 2^91350399 is an apocalyptic number.

91350399 is a deficient number, since it is larger than the sum of its proper divisors (48255873).

91350399 is a wasteful number, since it uses less digits than its factorization.

91350399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12686.

The product of its (nonzero) digits is 32805, while the sum is 39.

The square root of 91350399 is about 9557.7402664019. The cubic root of 91350399 is about 450.3707216665.

The spelling of 91350399 in words is "ninety-one million, three hundred fifty thousand, three hundred ninety-nine".