49720831 has 2 divisors, whose sum is σ = 49720832. Its totient is φ = 49720830.

The previous prime is 49720789. The next prime is 49720849. The reversal of 49720831 is 13802794.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 49720831 - 2¹¹ = 49718783 is a prime.

It is a super-2 number, since 2×49720831² = 4944322070661122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (49720861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24860415 + 24860416.

It is an arithmetic number, because the mean of its divisors is an integer number (24860416).

Almost surely, 2^49720831 is an apocalyptic number.

49720831 is a deficient number, since it is larger than the sum of its proper divisors (1).

49720831 is an equidigital number, since it uses as much as digits as its factorization.

49720831 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 49720831 is about 7051.2999510729. The cubic root of 49720831 is about 367.7162248927.

The spelling of 49720831 in words is "forty-nine million, seven hundred twenty thousand, eight hundred thirty-one".