49039991 has 16 divisors (see below), whose sum is σ = 65845248. Its totient is φ = 35272800.

The previous prime is 49039973. The next prime is 49039993. The reversal of 49039991 is 19993094.

It is a cyclic number.

It is not a de Polignac number, because 49039991 - 2⁶ = 49039927 is a prime.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49039993) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23495 + ... + 25496.

It is an arithmetic number, because the mean of its divisors is an integer number (4115328).

Almost surely, 2^49039991 is an apocalyptic number.

49039991 is a deficient number, since it is larger than the sum of its proper divisors (16805257).

49039991 is a wasteful number, since it uses less digits than its factorization.

49039991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49022.

The product of its (nonzero) digits is 78732, while the sum is 44.

The square root of 49039991 is about 7002.8559174097. The cubic root of 49039991 is about 366.0300944727.

The spelling of 49039991 in words is "forty-nine million, thirty-nine thousand, nine hundred ninety-one".