49921787 has 2 divisors, whose sum is σ = 49921788. Its totient is φ = 49921786.

The previous prime is 49921783. The next prime is 49921793. The reversal of 49921787 is 78712994.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 49921787 - 2² = 49921783 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (49921783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24960893 + 24960894.

It is an arithmetic number, because the mean of its divisors is an integer number (24960894).

Almost surely, 2^49921787 is an apocalyptic number.

49921787 is a deficient number, since it is larger than the sum of its proper divisors (1).

49921787 is an equidigital number, since it uses as much as digits as its factorization.

49921787 is an evil number, because the sum of its binary digits is even.

The product of its digits is 254016, while the sum is 47.

The square root of 49921787 is about 7065.5351531218. The cubic root of 49921787 is about 368.2109568455.

The spelling of 49921787 in words is "forty-nine million, nine hundred twenty-one thousand, seven hundred eighty-seven".