47618729 has 2 divisors, whose sum is σ = 47618730. Its totient is φ = 47618728.

The previous prime is 47618707. The next prime is 47618737. The reversal of 47618729 is 92781674.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29539225 + 18079504 = 5435^2 + 4252^2 .

It is a cyclic number.

It is not a de Polignac number, because 47618729 - 2¹⁶ = 47553193 is a prime.

It is a Sophie Germain prime.

It is an alternating number because its digits alternate between even and odd.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 47618729.

It is not a weakly prime, because it can be changed into another prime (47618929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23809364 + 23809365.

It is an arithmetic number, because the mean of its divisors is an integer number (23809365).

Almost surely, 2^47618729 is an apocalyptic number.

It is an amenable number.

47618729 is a deficient number, since it is larger than the sum of its proper divisors (1).

47618729 is an equidigital number, since it uses as much as digits as its factorization.

47618729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 169344, while the sum is 44.

The square root of 47618729 is about 6900.6325072416. The cubic root of 47618729 is about 362.4593159256.

The spelling of 47618729 in words is "forty-seven million, six hundred eighteen thousand, seven hundred twenty-nine".