49978777 has 2 divisors, whose sum is σ = 49978778. Its totient is φ = 49978776.

The previous prime is 49978729. The next prime is 49978783. The reversal of 49978777 is 77787994.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46022656 + 3956121 = 6784^2 + 1989^2 .

It is a cyclic number.

It is not a de Polignac number, because 49978777 - 2¹⁵ = 49946009 is a prime.

It is not a weakly prime, because it can be changed into another prime (49978787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24989388 + 24989389.

It is an arithmetic number, because the mean of its divisors is an integer number (24989389).

Almost surely, 2^49978777 is an apocalyptic number.

It is an amenable number.

49978777 is a deficient number, since it is larger than the sum of its proper divisors (1).

49978777 is an equidigital number, since it uses as much as digits as its factorization.

49978777 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6223392, while the sum is 58.

The square root of 49978777 is about 7069.5669598639. The cubic root of 49978777 is about 368.3510183538.

The spelling of 49978777 in words is "forty-nine million, nine hundred seventy-eight thousand, seven hundred seventy-seven".