47623991 has 2 divisors, whose sum is σ = 47623992. Its totient is φ = 47623990.

The previous prime is 47623973. The next prime is 47623997. The reversal of 47623991 is 19932674.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47623991 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47623997) 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 as a sum of consecutive naturals, namely, 23811995 + 23811996.

It is an arithmetic number, because the mean of its divisors is an integer number (23811996).

Almost surely, 2^47623991 is an apocalyptic number.

47623991 is a deficient number, since it is larger than the sum of its proper divisors (1).

47623991 is an equidigital number, since it uses as much as digits as its factorization.

47623991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 81648, while the sum is 41.

The square root of 47623991 is about 6901.0137661071. The cubic root of 47623991 is about 362.4726663496.

The spelling of 47623991 in words is "forty-seven million, six hundred twenty-three thousand, nine hundred ninety-one".