91014145 has 4 divisors (see below), whose sum is σ = 109216980. Its totient is φ = 72811312.

The previous prime is 91014139. The next prime is 91014149. The reversal of 91014145 is 54141019.

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

It can be written as a sum of positive squares in 2 ways, for example, as 28430224 + 62583921 = 5332^2 + 7911^2 .

It is a cyclic number.

It is not a de Polignac number, because 91014145 - 2¹⁷ = 90883073 is a prime.

It is not an unprimeable number, because it can be changed into a prime (91014149) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9101410 + ... + 9101419.

It is an arithmetic number, because the mean of its divisors is an integer number (27304245).

Almost surely, 2^91014145 is an apocalyptic number.

It is an amenable number.

91014145 is a deficient number, since it is larger than the sum of its proper divisors (18202835).

91014145 is a wasteful number, since it uses less digits than its factorization.

91014145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18202834.

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 91014145 is about 9540.1333848118. The cubic root of 91014145 is about 449.8174485882.

The spelling of 91014145 in words is "ninety-one million, fourteen thousand, one hundred forty-five".