49679309 has 2 divisors, whose sum is σ = 49679310. Its totient is φ = 49679308.

The previous prime is 49679299. The next prime is 49679323. The reversal of 49679309 is 90397694.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42640900 + 7038409 = 6530^2 + 2653^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-49679309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (49679009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24839654 + 24839655.

It is an arithmetic number, because the mean of its divisors is an integer number (24839655).

Almost surely, 2^49679309 is an apocalyptic number.

It is an amenable number.

49679309 is a deficient number, since it is larger than the sum of its proper divisors (1).

49679309 is an equidigital number, since it uses as much as digits as its factorization.

49679309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 367416, while the sum is 47.

The square root of 49679309 is about 7048.3550563234. The cubic root of 49679309 is about 367.6138361154.

The spelling of 49679309 in words is "forty-nine million, six hundred seventy-nine thousand, three hundred nine".