47197861 has 4 divisors (see below), whose sum is σ = 47338252. Its totient is φ = 47057472.

The previous prime is 47197853. The next prime is 47197879. The reversal of 47197861 is 16879174.

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 12916836 + 34281025 = 3594^2 + 5855^2 .

It is a cyclic number.

It is not a de Polignac number, because 47197861 - 2³ = 47197853 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 (47197261) 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, 69690 + ... + 70363.

It is an arithmetic number, because the mean of its divisors is an integer number (11834563).

Almost surely, 2^47197861 is an apocalyptic number.

It is an amenable number.

47197861 is a deficient number, since it is larger than the sum of its proper divisors (140391).

47197861 is a wasteful number, since it uses less digits than its factorization.

47197861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140390.

The product of its digits is 84672, while the sum is 43.

The square root of 47197861 is about 6870.0699414198. The cubic root of 47197861 is about 361.3883145919.

The spelling of 47197861 in words is "forty-seven million, one hundred ninety-seven thousand, eight hundred sixty-one".