47897479 has 4 divisors (see below), whose sum is σ = 54739984. Its totient is φ = 41054976.

The previous prime is 47897459. The next prime is 47897489. The reversal of 47897479 is 97479874.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97479874 = 2 ⋅48739937.

It is a cyclic number.

It is not a de Polignac number, because 47897479 - 2¹⁵ = 47864711 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47897419) 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, 3421242 + ... + 3421255.

It is an arithmetic number, because the mean of its divisors is an integer number (13684996).

Almost surely, 2^47897479 is an apocalyptic number.

47897479 is a deficient number, since it is larger than the sum of its proper divisors (6842505).

47897479 is an equidigital number, since it uses as much as digits as its factorization.

47897479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6842504.

The product of its digits is 3556224, while the sum is 55.

The square root of 47897479 is about 6920.8004594844. The cubic root of 47897479 is about 363.1651938310.

The spelling of 47897479 in words is "forty-seven million, eight hundred ninety-seven thousand, four hundred seventy-nine".