47645194 has 4 divisors (see below), whose sum is σ = 71467794. Its totient is φ = 23822596.

The previous prime is 47645183. The next prime is 47645197. The reversal of 47645194 is 49154674.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 49154674 = 2 ⋅24577337.

It can be written as a sum of positive squares in only one way, i.e., 25130169 + 22515025 = 5013^2 + 4745^2 .

It is a super-2 number, since 2×47645194² = 4540129022595272, which contains 22 as substring.

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 not an unprimeable number, because it can be changed into a prime (47645197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11911297 + ... + 11911300.

Almost surely, 2^47645194 is an apocalyptic number.

47645194 is a deficient number, since it is larger than the sum of its proper divisors (23822600).

47645194 is a wasteful number, since it uses less digits than its factorization.

47645194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23822599.

The product of its digits is 120960, while the sum is 40.

The square root of 47645194 is about 6902.5498187264. The cubic root of 47645194 is about 362.5264513397.

The spelling of 47645194 in words is "forty-seven million, six hundred forty-five thousand, one hundred ninety-four".