47977797 has 16 divisors (see below), whose sum is σ = 74350080. Its totient is φ = 26950512.

The previous prime is 47977777. The next prime is 47977799. The reversal of 47977797 is 79777974.

It is not a de Polignac number, because 47977797 - 2⁶ = 47977733 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47977799) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18123 + ... + 20600.

It is an arithmetic number, because the mean of its divisors is an integer number (4646880).

Almost surely, 2^47977797 is an apocalyptic number.

It is an amenable number.

47977797 is a deficient number, since it is larger than the sum of its proper divisors (26372283).

47977797 is a wasteful number, since it uses less digits than its factorization.

47977797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38792.

The product of its digits is 5445468, while the sum is 57.

The square root of 47977797 is about 6926.6006814310. The cubic root of 47977797 is about 363.3680744680.

The spelling of 47977797 in words is "forty-seven million, nine hundred seventy-seven thousand, seven hundred ninety-seven".