91018054 has 4 divisors (see below), whose sum is σ = 136527084. Its totient is φ = 45509026.

The previous prime is 91018043. The next prime is 91018063. The reversal of 91018054 is 45081019.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 45081019 = 647 ⋅69677.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22754512 + ... + 22754515.

It is an arithmetic number, because the mean of its divisors is an integer number (34131771).

Almost surely, 2^91018054 is an apocalyptic number.

91018054 is a deficient number, since it is larger than the sum of its proper divisors (45509030).

91018054 is a wasteful number, since it uses less digits than its factorization.

91018054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45509029.

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 91018054 is about 9540.3382539614. The cubic root of 91018054 is about 449.8238882877.

The spelling of 91018054 in words is "ninety-one million, eighteen thousand, fifty-four".