44497991 has 4 divisors (see below), whose sum is σ = 45532872. Its totient is φ = 43463112.

The previous prime is 44497987. The next prime is 44498009. The reversal of 44497991 is 19979444.

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 44497991 - 2² = 44497987 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44497951) 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, 517376 + ... + 517461.

It is an arithmetic number, because the mean of its divisors is an integer number (11383218).

Almost surely, 2^44497991 is an apocalyptic number.

44497991 is a deficient number, since it is larger than the sum of its proper divisors (1034881).

44497991 is a wasteful number, since it uses less digits than its factorization.

44497991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1034880.

The product of its digits is 326592, while the sum is 47.

The square root of 44497991 is about 6670.6814494473. The cubic root of 44497991 is about 354.3617202352.

The spelling of 44497991 in words is "forty-four million, four hundred ninety-seven thousand, nine hundred ninety-one".