49686779 has 2 divisors, whose sum is σ = 49686780. Its totient is φ = 49686778.

The previous prime is 49686761. The next prime is 49686797. The reversal of 49686779 is 97768694.

Together with next prime (49686797) it forms an Ormiston pair, because they use the same digits, order apart.

It is a balanced prime because it is at equal distance from previous prime (49686761) and next prime (49686797).

It is a cyclic number.

It is not a de Polignac number, because 49686779 - 2¹² = 49682683 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (49686719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24843389 + 24843390.

It is an arithmetic number, because the mean of its divisors is an integer number (24843390).

Almost surely, 2^49686779 is an apocalyptic number.

49686779 is a deficient number, since it is larger than the sum of its proper divisors (1).

49686779 is an equidigital number, since it uses as much as digits as its factorization.

49686779 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4572288, while the sum is 56.

The square root of 49686779 is about 7048.8849472807. The cubic root of 49686779 is about 367.6322605379.

The spelling of 49686779 in words is "forty-nine million, six hundred eighty-six thousand, seven hundred seventy-nine".