44978891 has 2 divisors, whose sum is σ = 44978892. Its totient is φ = 44978890.

The previous prime is 44978873. The next prime is 44978893. The reversal of 44978891 is 19887944.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 44978891 - 2²² = 40784587 is a prime.

Together with 44978893, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (44978893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22489445 + 22489446.

It is an arithmetic number, because the mean of its divisors is an integer number (22489446).

Almost surely, 2^44978891 is an apocalyptic number.

44978891 is a deficient number, since it is larger than the sum of its proper divisors (1).

44978891 is an equidigital number, since it uses as much as digits as its factorization.

44978891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 580608, while the sum is 50.

The square root of 44978891 is about 6706.6303759787. The cubic root of 44978891 is about 355.6337051128.

The spelling of 44978891 in words is "forty-four million, nine hundred seventy-eight thousand, eight hundred ninety-one".