49977971 has 4 divisors (see below), whose sum is σ = 50797344. Its totient is φ = 49158600.

The previous prime is 49977959. The next prime is 49978001. The reversal of 49977971 is 17977994.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17977994 = 2 ⋅8988997.

It is a cyclic number.

It is not a de Polignac number, because 49977971 - 2²² = 45783667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (49977271) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 409595 + ... + 409716.

It is an arithmetic number, because the mean of its divisors is an integer number (12699336).

Almost surely, 2^49977971 is an apocalyptic number.

49977971 is a deficient number, since it is larger than the sum of its proper divisors (819373).

49977971 is an equidigital number, since it uses as much as digits as its factorization.

49977971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 819372.

The product of its digits is 1000188, while the sum is 53.

The square root of 49977971 is about 7069.5099547281. The cubic root of 49977971 is about 368.3490382298.

The spelling of 49977971 in words is "forty-nine million, nine hundred seventy-seven thousand, nine hundred seventy-one".