49215977 has 2 divisors, whose sum is σ = 49215978. Its totient is φ = 49215976.

The previous prime is 49215923. The next prime is 49215983. The reversal of 49215977 is 77951294.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42784681 + 6431296 = 6541^2 + 2536^2 .

It is a cyclic number.

It is not a de Polignac number, because 49215977 - 2¹⁶ = 49150441 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (49215997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24607988 + 24607989.

It is an arithmetic number, because the mean of its divisors is an integer number (24607989).

Almost surely, 2^49215977 is an apocalyptic number.

It is an amenable number.

49215977 is a deficient number, since it is larger than the sum of its proper divisors (1).

49215977 is an equidigital number, since it uses as much as digits as its factorization.

49215977 is an evil number, because the sum of its binary digits is even.

The product of its digits is 158760, while the sum is 44.

The square root of 49215977 is about 7015.4099666377. The cubic root of 49215977 is about 366.4674196641.

The spelling of 49215977 in words is "forty-nine million, two hundred fifteen thousand, nine hundred seventy-seven".