47172046 has 4 divisors (see below), whose sum is σ = 70758072. Its totient is φ = 23586022.

The previous prime is 47172029. The next prime is 47172071. The reversal of 47172046 is 64027174.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 64027174 = 2 ⋅32013587.

It is a super-2 number, since 2×47172046² = 4450403847652232, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) 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 = 47171999 and 47172017.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11793010 + ... + 11793013.

It is an arithmetic number, because the mean of its divisors is an integer number (17689518).

Almost surely, 2^47172046 is an apocalyptic number.

47172046 is a deficient number, since it is larger than the sum of its proper divisors (23586026).

47172046 is a wasteful number, since it uses less digits than its factorization.

47172046 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23586025.

The product of its (nonzero) digits is 9408, while the sum is 31.

The square root of 47172046 is about 6868.1908826124. The cubic root of 47172046 is about 361.3224151313.

The spelling of 47172046 in words is "forty-seven million, one hundred seventy-two thousand, forty-six".