49091431 has 2 divisors, whose sum is σ = 49091432. Its totient is φ = 49091430.

The previous prime is 49091401. The next prime is 49091447. The reversal of 49091431 is 13419094.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 49091431 - 2⁹ = 49090919 is a prime.

It is a super-2 number, since 2×49091431² = 4819937195255522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 49091393 and 49091402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (49091401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24545715 + 24545716.

It is an arithmetic number, because the mean of its divisors is an integer number (24545716).

Almost surely, 2^49091431 is an apocalyptic number.

49091431 is a deficient number, since it is larger than the sum of its proper divisors (1).

49091431 is an equidigital number, since it uses as much as digits as its factorization.

49091431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 49091431 is about 7006.5277420417. The cubic root of 49091431 is about 366.1580309327.

The spelling of 49091431 in words is "forty-nine million, ninety-one thousand, four hundred thirty-one".