49689397 has 2 divisors, whose sum is σ = 49689398. Its totient is φ = 49689396.

The previous prime is 49689391. The next prime is 49689439. The reversal of 49689397 is 79398694.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48525156 + 1164241 = 6966^2 + 1079^2 .

It is a cyclic number.

It is not a de Polignac number, because 49689397 - 2²³ = 41300789 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (49689391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24844698 + 24844699.

It is an arithmetic number, because the mean of its divisors is an integer number (24844699).

Almost surely, 2^49689397 is an apocalyptic number.

It is an amenable number.

49689397 is a deficient number, since it is larger than the sum of its proper divisors (1).

49689397 is an equidigital number, since it uses as much as digits as its factorization.

49689397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2939328, while the sum is 55.

The square root of 49689397 is about 7049.0706479649. The cubic root of 49689397 is about 367.6387172814.

It can be divided in two parts, 49689 and 397, that added together give a triangular number (50086 = T₃₁₆).

The spelling of 49689397 in words is "forty-nine million, six hundred eighty-nine thousand, three hundred ninety-seven".