49397779 has 2 divisors, whose sum is σ = 49397780. Its totient is φ = 49397778.

The previous prime is 49397741. The next prime is 49397783. The reversal of 49397779 is 97779394.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 49397779 - 2⁹ = 49397267 is a prime.

It is not a weakly prime, because it can be changed into another prime (49397279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24698889 + 24698890.

It is an arithmetic number, because the mean of its divisors is an integer number (24698890).

Almost surely, 2^49397779 is an apocalyptic number.

49397779 is a deficient number, since it is larger than the sum of its proper divisors (1).

49397779 is an equidigital number, since it uses as much as digits as its factorization.

49397779 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3000564, while the sum is 55.

The square root of 49397779 is about 7028.3553552734. The cubic root of 49397779 is about 366.9181042160.

It can be divided in two parts, 49397 and 779, that added together give a square (50176 = 224²).

The spelling of 49397779 in words is "forty-nine million, three hundred ninety-seven thousand, seven hundred seventy-nine".