47992121 has 2 divisors, whose sum is σ = 47992122. Its totient is φ = 47992120.

The previous prime is 47992079. The next prime is 47992141. The reversal of 47992121 is 12129974.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47334400 + 657721 = 6880^2 + 811^2 .

It is a cyclic number.

It is not a de Polignac number, because 47992121 - 2⁶ = 47992057 is a prime.

It is not a weakly prime, because it can be changed into another prime (47992141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23996060 + 23996061.

It is an arithmetic number, because the mean of its divisors is an integer number (23996061).

Almost surely, 2^47992121 is an apocalyptic number.

It is an amenable number.

47992121 is a deficient number, since it is larger than the sum of its proper divisors (1).

47992121 is an equidigital number, since it uses as much as digits as its factorization.

47992121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9072, while the sum is 35.

The square root of 47992121 is about 6927.6345890932. The cubic root of 47992121 is about 363.4042326267.

The spelling of 47992121 in words is "forty-seven million, nine hundred ninety-two thousand, one hundred twenty-one".