49977839 has 2 divisors, whose sum is σ = 49977840. Its totient is φ = 49977838.

The previous prime is 49977803. The next prime is 49977853. The reversal of 49977839 is 93877994.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 49977839 - 2²⁴ = 33200623 is a prime.

It is a super-2 number, since 2×49977839² = 4995568782219842, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (49977899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24988919 + 24988920.

It is an arithmetic number, because the mean of its divisors is an integer number (24988920).

Almost surely, 2^49977839 is an apocalyptic number.

49977839 is a deficient number, since it is larger than the sum of its proper divisors (1).

49977839 is an equidigital number, since it uses as much as digits as its factorization.

49977839 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3429216, while the sum is 56.

The square root of 49977839 is about 7069.5006188556. The cubic root of 49977839 is about 368.3487139395.

The spelling of 49977839 in words is "forty-nine million, nine hundred seventy-seven thousand, eight hundred thirty-nine".