49739897 has 2 divisors, whose sum is σ = 49739898. Its totient is φ = 49739896.

The previous prime is 49739857. The next prime is 49739947. The reversal of 49739897 is 79893794.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29767936 + 19971961 = 5456^2 + 4469^2 .

It is a cyclic number.

It is not a de Polignac number, because 49739897 - 2²⁴ = 32962681 is a prime.

It is not a weakly prime, because it can be changed into another prime (49739857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24869948 + 24869949.

It is an arithmetic number, because the mean of its divisors is an integer number (24869949).

Almost surely, 2^49739897 is an apocalyptic number.

It is an amenable number.

49739897 is a deficient number, since it is larger than the sum of its proper divisors (1).

49739897 is an equidigital number, since it uses as much as digits as its factorization.

49739897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3429216, while the sum is 56.

The square root of 49739897 is about 7052.6517707881. The cubic root of 49739897 is about 367.7632204977.

The spelling of 49739897 in words is "forty-nine million, seven hundred thirty-nine thousand, eight hundred ninety-seven".