47886397 has 4 divisors (see below), whose sum is σ = 51569980. Its totient is φ = 44202816.

The previous prime is 47886389. The next prime is 47886409. The reversal of 47886397 is 79368874.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 24740676 + 23145721 = 4974^2 + 4811^2 .

It is a cyclic number.

It is not a de Polignac number, because 47886397 - 2³ = 47886389 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 (47886367) 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, 1841772 + ... + 1841797.

It is an arithmetic number, because the mean of its divisors is an integer number (12892495).

Almost surely, 2^47886397 is an apocalyptic number.

It is an amenable number.

47886397 is a deficient number, since it is larger than the sum of its proper divisors (3683583).

47886397 is a wasteful number, since it uses less digits than its factorization.

47886397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3683582.

The product of its digits is 2032128, while the sum is 52.

The square root of 47886397 is about 6919.9997832370. Note that the first 3 decimals coincide. The cubic root of 47886397 is about 363.1371832608.

The spelling of 47886397 in words is "forty-seven million, eight hundred eighty-six thousand, three hundred ninety-seven".