719988961 has 2 divisors, whose sum is σ = 719988962. Its totient is φ = 719988960.

The previous prime is 719988943. The next prime is 719988967. The reversal of 719988961 is 169889917.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 461390400 + 258598561 = 21480^2 + 16081^2 .

It is a cyclic number.

It is not a de Polignac number, because 719988961 - 2⁹ = 719988449 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 719988896 and 719988905.

It is not a weakly prime, because it can be changed into another prime (719988967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 359994480 + 359994481.

It is an arithmetic number, because the mean of its divisors is an integer number (359994481).

Almost surely, 2^719988961 is an apocalyptic number.

It is an amenable number.

719988961 is a deficient number, since it is larger than the sum of its proper divisors (1).

719988961 is an equidigital number, since it uses as much as digits as its factorization.

719988961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1959552, while the sum is 58.

The square root of 719988961 is about 26832.6100295890. The cubic root of 719988961 is about 896.2763687114.

The spelling of 719988961 in words is "seven hundred nineteen million, nine hundred eighty-eight thousand, nine hundred sixty-one".