49390391 has 2 divisors, whose sum is σ = 49390392. Its totient is φ = 49390390.

The previous prime is 49390381. The next prime is 49390399. The reversal of 49390391 is 19309394.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-49390391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (49390399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24695195 + 24695196.

It is an arithmetic number, because the mean of its divisors is an integer number (24695196).

Almost surely, 2^49390391 is an apocalyptic number.

49390391 is a deficient number, since it is larger than the sum of its proper divisors (1).

49390391 is an equidigital number, since it uses as much as digits as its factorization.

49390391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26244, while the sum is 38.

The square root of 49390391 is about 7027.8297503568. The cubic root of 49390391 is about 366.8998110446.

The spelling of 49390391 in words is "forty-nine million, three hundred ninety thousand, three hundred ninety-one".