49191239 has 2 divisors, whose sum is σ = 49191240. Its totient is φ = 49191238.

The previous prime is 49191229. The next prime is 49191253. The reversal of 49191239 is 93219194.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-49191239 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (49191229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24595619 + 24595620.

It is an arithmetic number, because the mean of its divisors is an integer number (24595620).

Almost surely, 2^49191239 is an apocalyptic number.

49191239 is a deficient number, since it is larger than the sum of its proper divisors (1).

49191239 is an equidigital number, since it uses as much as digits as its factorization.

49191239 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17496, while the sum is 38.

The square root of 49191239 is about 7013.6466263991. The cubic root of 49191239 is about 366.4060087773.

The spelling of 49191239 in words is "forty-nine million, one hundred ninety-one thousand, two hundred thirty-nine".