47993819 has 2 divisors, whose sum is σ = 47993820. Its totient is φ = 47993818.

The previous prime is 47993809. The next prime is 47993857. The reversal of 47993819 is 91839974.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47993819 is a prime.

It is a super-2 number, since 2×47993819² = 4606813324409522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (47993809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23996909 + 23996910.

It is an arithmetic number, because the mean of its divisors is an integer number (23996910).

Almost surely, 2^47993819 is an apocalyptic number.

47993819 is a deficient number, since it is larger than the sum of its proper divisors (1).

47993819 is an equidigital number, since it uses as much as digits as its factorization.

47993819 is an evil number, because the sum of its binary digits is even.

The product of its digits is 489888, while the sum is 50.

The square root of 47993819 is about 6927.7571406625. The cubic root of 47993819 is about 363.4085184213.

The spelling of 47993819 in words is "forty-seven million, nine hundred ninety-three thousand, eight hundred nineteen".