47219797 has 2 divisors, whose sum is σ = 47219798. Its totient is φ = 47219796.

The previous prime is 47219773. The next prime is 47219803. The reversal of 47219797 is 79791274.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47141956 + 77841 = 6866^2 + 279^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47219797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47219707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23609898 + 23609899.

It is an arithmetic number, because the mean of its divisors is an integer number (23609899).

Almost surely, 2^47219797 is an apocalyptic number.

It is an amenable number.

47219797 is a deficient number, since it is larger than the sum of its proper divisors (1).

47219797 is an equidigital number, since it uses as much as digits as its factorization.

47219797 is an evil number, because the sum of its binary digits is even.

The product of its digits is 222264, while the sum is 46.

The square root of 47219797 is about 6871.6662462608. Note that the first 3 decimals coincide. The cubic root of 47219797 is about 361.4442930204. Note that the first 3 decimals are identical.

The spelling of 47219797 in words is "forty-seven million, two hundred nineteen thousand, seven hundred ninety-seven".