47347391 has 16 divisors (see below), whose sum is σ = 59379264. Its totient is φ = 36751104.

The previous prime is 47347387. The next prime is 47347427. The reversal of 47347391 is 19374374.

It is a happy number.

It is not a de Polignac number, because 47347391 - 2² = 47347387 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47347331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 86 + ... + 9731.

It is an arithmetic number, because the mean of its divisors is an integer number (3711204).

Almost surely, 2^47347391 is an apocalyptic number.

47347391 is a deficient number, since it is larger than the sum of its proper divisors (12031873).

47347391 is a wasteful number, since it uses less digits than its factorization.

47347391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9890.

The product of its digits is 63504, while the sum is 38.

The square root of 47347391 is about 6880.9440486026. The cubic root of 47347391 is about 361.7695566404.

The spelling of 47347391 in words is "forty-seven million, three hundred forty-seven thousand, three hundred ninety-one".