47397442 has 4 divisors (see below), whose sum is σ = 71096166. Its totient is φ = 23698720.

The previous prime is 47397437. The next prime is 47397461. The reversal of 47397442 is 24479374.

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

It can be written as a sum of positive squares in only one way, i.e., 38700841 + 8696601 = 6221^2 + 2949^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 47397395 and 47397404.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11849359 + ... + 11849362.

Almost surely, 2^47397442 is an apocalyptic number.

47397442 is a deficient number, since it is larger than the sum of its proper divisors (23698724).

47397442 is a wasteful number, since it uses less digits than its factorization.

47397442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23698723.

The product of its digits is 169344, while the sum is 40.

The square root of 47397442 is about 6884.5800162392. The cubic root of 47397442 is about 361.8969874671.

The spelling of 47397442 in words is "forty-seven million, three hundred ninety-seven thousand, four hundred forty-two".