47619721 has 2 divisors, whose sum is σ = 47619722. Its totient is φ = 47619720.

The previous prime is 47619659. The next prime is 47619727. The reversal of 47619721 is 12791674.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38887696 + 8732025 = 6236^2 + 2955^2 .

It is a cyclic number.

It is not a de Polignac number, because 47619721 - 2¹¹ = 47617673 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (47619727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23809860 + 23809861.

It is an arithmetic number, because the mean of its divisors is an integer number (23809861).

Almost surely, 2^47619721 is an apocalyptic number.

It is an amenable number.

47619721 is a deficient number, since it is larger than the sum of its proper divisors (1).

47619721 is an equidigital number, since it uses as much as digits as its factorization.

47619721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21168, while the sum is 37.

The square root of 47619721 is about 6900.7043843364. The cubic root of 47619721 is about 362.4618328425.

The spelling of 47619721 in words is "forty-seven million, six hundred nineteen thousand, seven hundred twenty-one".