47290391 has 2 divisors, whose sum is σ = 47290392. Its totient is φ = 47290390.

The previous prime is 47290381. The next prime is 47290393. The reversal of 47290391 is 19309274.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 47290391 - 2²² = 43096087 is a prime.

Together with 47290393, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47290393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23645195 + 23645196.

It is an arithmetic number, because the mean of its divisors is an integer number (23645196).

Almost surely, 2^47290391 is an apocalyptic number.

47290391 is a deficient number, since it is larger than the sum of its proper divisors (1).

47290391 is an equidigital number, since it uses as much as digits as its factorization.

47290391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13608, while the sum is 35.

The square root of 47290391 is about 6876.8009277570. The cubic root of 47290391 is about 361.6243241030.

The spelling of 47290391 in words is "forty-seven million, two hundred ninety thousand, three hundred ninety-one".