91398095 has 4 divisors (see below), whose sum is σ = 109677720. Its totient is φ = 73118472.

The previous prime is 91398071. The next prime is 91398101. The reversal of 91398095 is 59089319.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 91398095 - 2²² = 87203791 is a prime.

It is a super-2 number, since 2×91398095² = 16707223539258050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9139805 + ... + 9139814.

It is an arithmetic number, because the mean of its divisors is an integer number (27419430).

Almost surely, 2^91398095 is an apocalyptic number.

91398095 is a deficient number, since it is larger than the sum of its proper divisors (18279625).

91398095 is a wasteful number, since it uses less digits than its factorization.

91398095 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18279624.

The product of its (nonzero) digits is 87480, while the sum is 44.

The square root of 91398095 is about 9560.2350912517. The cubic root of 91398095 is about 450.4490907622.

The spelling of 91398095 in words is "ninety-one million, three hundred ninety-eight thousand, ninety-five".