49697257 has 2 divisors, whose sum is σ = 49697258. Its totient is φ = 49697256.

The previous prime is 49697243. The next prime is 49697267. The reversal of 49697257 is 75279694.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48149721 + 1547536 = 6939^2 + 1244^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-49697257 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 49697257.

It is not a weakly prime, because it can be changed into another prime (49697237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24848628 + 24848629.

It is an arithmetic number, because the mean of its divisors is an integer number (24848629).

Almost surely, 2^49697257 is an apocalyptic number.

It is an amenable number.

49697257 is a deficient number, since it is larger than the sum of its proper divisors (1).

49697257 is an equidigital number, since it uses as much as digits as its factorization.

49697257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 952560, while the sum is 49.

The square root of 49697257 is about 7049.6281462216. The cubic root of 49697257 is about 367.6581009470.

The spelling of 49697257 in words is "forty-nine million, six hundred ninety-seven thousand, two hundred fifty-seven".