47431399 has 2 divisors, whose sum is σ = 47431400. Its totient is φ = 47431398.

The previous prime is 47431381. The next prime is 47431409. The reversal of 47431399 is 99313474.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 47431399 - 2⁵ = 47431367 is a prime.

It is a super-2 number, since 2×47431399² = 4499475222194402, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47431369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23715699 + 23715700.

It is an arithmetic number, because the mean of its divisors is an integer number (23715700).

Almost surely, 2^47431399 is an apocalyptic number.

47431399 is a deficient number, since it is larger than the sum of its proper divisors (1).

47431399 is an equidigital number, since it uses as much as digits as its factorization.

47431399 is an evil number, because the sum of its binary digits is even.

The product of its digits is 81648, while the sum is 40.

The square root of 47431399 is about 6887.0457381957. The cubic root of 47431399 is about 361.9833915846.

The spelling of 47431399 in words is "forty-seven million, four hundred thirty-one thousand, three hundred ninety-nine".