722977943 has 2 divisors, whose sum is σ = 722977944. Its totient is φ = 722977942.

The previous prime is 722977867. The next prime is 722977951. The reversal of 722977943 is 349779227.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 722977943 - 2⁸ = 722977687 is a prime.

It is a super-2 number, since 2×722977943² = 1045394212129022498, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 722977891 and 722977900.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (722977973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 361488971 + 361488972.

It is an arithmetic number, because the mean of its divisors is an integer number (361488972).

Almost surely, 2^722977943 is an apocalyptic number.

722977943 is a deficient number, since it is larger than the sum of its proper divisors (1).

722977943 is an equidigital number, since it uses as much as digits as its factorization.

722977943 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1333584, while the sum is 50.

The square root of 722977943 is about 26888.2491620410. The cubic root of 722977943 is about 897.5149318207.

The spelling of 722977943 in words is "seven hundred twenty-two million, nine hundred seventy-seven thousand, nine hundred forty-three".