47640629 has 2 divisors, whose sum is σ = 47640630. Its totient is φ = 47640628.

The previous prime is 47640623. The next prime is 47640631. The reversal of 47640629 is 92604674.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47637604 + 3025 = 6902^2 + 55^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47640629 is a prime.

Together with 47640631, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 47640592 and 47640601.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47640623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23820314 + 23820315.

It is an arithmetic number, because the mean of its divisors is an integer number (23820315).

Almost surely, 2^47640629 is an apocalyptic number.

It is an amenable number.

47640629 is a deficient number, since it is larger than the sum of its proper divisors (1).

47640629 is an equidigital number, since it uses as much as digits as its factorization.

47640629 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72576, while the sum is 38.

The square root of 47640629 is about 6902.2191359011. The cubic root of 47640629 is about 362.5148727945.

The spelling of 47640629 in words is "forty-seven million, six hundred forty thousand, six hundred twenty-nine".