4620697721 has 2 divisors, whose sum is σ = 4620697722. Its totient is φ = 4620697720.

The previous prime is 4620697703. The next prime is 4620697747. The reversal of 4620697721 is 1277960264.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4487526121 + 133171600 = 66989^2 + 11540^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4620697721 is a prime.

It is not a weakly prime, because it can be changed into another prime (4620697621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2310348860 + 2310348861.

It is an arithmetic number, because the mean of its divisors is an integer number (2310348861).

Almost surely, 2^4620697721 is an apocalyptic number.

It is an amenable number.

4620697721 is a deficient number, since it is larger than the sum of its proper divisors (1).

4620697721 is an equidigital number, since it uses as much as digits as its factorization.

4620697721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 254016, while the sum is 44.

The square root of 4620697721 is about 67975.7141999994. The cubic root of 4620697721 is about 1665.5941476009.

The spelling of 4620697721 in words is "four billion, six hundred twenty million, six hundred ninety-seven thousand, seven hundred twenty-one".