47507861 has 2 divisors, whose sum is σ = 47507862. Its totient is φ = 47507860.

The previous prime is 47507849. The next prime is 47507869. The reversal of 47507861 is 16870574.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30747025 + 16760836 = 5545^2 + 4094^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47507861 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 (47507869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23753930 + 23753931.

It is an arithmetic number, because the mean of its divisors is an integer number (23753931).

Almost surely, 2^47507861 is an apocalyptic number.

It is an amenable number.

47507861 is a deficient number, since it is larger than the sum of its proper divisors (1).

47507861 is an equidigital number, since it uses as much as digits as its factorization.

47507861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 47040, while the sum is 38.

The square root of 47507861 is about 6892.5946493320. The cubic root of 47507861 is about 362.1777994746.

The spelling of 47507861 in words is "forty-seven million, five hundred seven thousand, eight hundred sixty-one".