722991413 has 2 divisors, whose sum is σ = 722991414. Its totient is φ = 722991412.

The previous prime is 722991397. The next prime is 722991421. The reversal of 722991413 is 314199227.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 623351089 + 99640324 = 24967^2 + 9982^2 .

It is a cyclic number.

It is not a de Polignac number, because 722991413 - 2⁴ = 722991397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (722991443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 361495706 + 361495707.

It is an arithmetic number, because the mean of its divisors is an integer number (361495707).

Almost surely, 2^722991413 is an apocalyptic number.

It is an amenable number.

722991413 is a deficient number, since it is larger than the sum of its proper divisors (1).

722991413 is an equidigital number, since it uses as much as digits as its factorization.

722991413 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27216, while the sum is 38.

The square root of 722991413 is about 26888.4996420403. The cubic root of 722991413 is about 897.5205057349.

The spelling of 722991413 in words is "seven hundred twenty-two million, nine hundred ninety-one thousand, four hundred thirteen".