49620721 has 2 divisors, whose sum is σ = 49620722. Its totient is φ = 49620720.

The previous prime is 49620713. The next prime is 49620743. The reversal of 49620721 is 12702694.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39942400 + 9678321 = 6320^2 + 3111^2 .

It is a cyclic number.

It is not a de Polignac number, because 49620721 - 2³ = 49620713 is a prime.

It is not a weakly prime, because it can be changed into another prime (49620751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24810360 + 24810361.

It is an arithmetic number, because the mean of its divisors is an integer number (24810361).

Almost surely, 2^49620721 is an apocalyptic number.

It is an amenable number.

49620721 is a deficient number, since it is larger than the sum of its proper divisors (1).

49620721 is an equidigital number, since it uses as much as digits as its factorization.

49620721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 49620721 is about 7044.1976832000. The cubic root of 49620721 is about 367.4692673330.

The spelling of 49620721 in words is "forty-nine million, six hundred twenty thousand, seven hundred twenty-one".