721848370097 has 2 divisors, whose sum is σ = 721848370098. Its totient is φ = 721848370096.

The previous prime is 721848369953. The next prime is 721848370121. The reversal of 721848370097 is 790073848127.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 666784931761 + 55063438336 = 816569^2 + 234656^2 .

It is a cyclic number.

It is not a de Polignac number, because 721848370097 - 2³² = 717553402801 is a prime.

It is not a weakly prime, because it can be changed into another prime (721848370697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 360924185048 + 360924185049.

It is an arithmetic number, because the mean of its divisors is an integer number (360924185049).

Almost surely, 2^721848370097 is an apocalyptic number.

It is an amenable number.

721848370097 is a deficient number, since it is larger than the sum of its proper divisors (1).

721848370097 is an equidigital number, since it uses as much as digits as its factorization.

721848370097 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4741632, while the sum is 56.

The spelling of 721848370097 in words is "seven hundred twenty-one billion, eight hundred forty-eight million, three hundred seventy thousand, ninety-seven".