47157823 has 2 divisors, whose sum is σ = 47157824. Its totient is φ = 47157822.

The previous prime is 47157787. The next prime is 47157839. The reversal of 47157823 is 32875174.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 47157823 - 2¹⁷ = 47026751 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47157853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23578911 + 23578912.

It is an arithmetic number, because the mean of its divisors is an integer number (23578912).

Almost surely, 2^47157823 is an apocalyptic number.

47157823 is a deficient number, since it is larger than the sum of its proper divisors (1).

47157823 is an equidigital number, since it uses as much as digits as its factorization.

47157823 is an evil number, because the sum of its binary digits is even.

The product of its digits is 47040, while the sum is 37.

The square root of 47157823 is about 6867.1553790489. The cubic root of 47157823 is about 361.2860969745.

The spelling of 47157823 in words is "forty-seven million, one hundred fifty-seven thousand, eight hundred twenty-three".