49977817 has 8 divisors (see below), whose sum is σ = 51893640. Its totient is φ = 48074880.

The previous prime is 49977803. The next prime is 49977839. The reversal of 49977817 is 71877994.

It can be written as a sum of positive squares in 4 ways, for example, as 25613721 + 24364096 = 5061^2 + 4936^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-49977817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (49977877) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5083 + ... + 11215.

It is an arithmetic number, because the mean of its divisors is an integer number (6486705).

Almost surely, 2^49977817 is an apocalyptic number.

It is an amenable number.

49977817 is a deficient number, since it is larger than the sum of its proper divisors (1915823).

49977817 is a wasteful number, since it uses less digits than its factorization.

49977817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6443.

The product of its digits is 889056, while the sum is 52.

The square root of 49977817 is about 7069.4990628757. The cubic root of 49977817 is about 368.3486598911.

The spelling of 49977817 in words is "forty-nine million, nine hundred seventy-seven thousand, eight hundred seventeen".