719688091 has 2 divisors, whose sum is σ = 719688092. Its totient is φ = 719688090.

The previous prime is 719688059. The next prime is 719688097. The reversal of 719688091 is 190886917.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 719688091 - 2⁵ = 719688059 is a prime.

It is not a weakly prime, because it can be changed into another prime (719688097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 359844045 + 359844046.

It is an arithmetic number, because the mean of its divisors is an integer number (359844046).

Almost surely, 2^719688091 is an apocalyptic number.

719688091 is a deficient number, since it is larger than the sum of its proper divisors (1).

719688091 is an equidigital number, since it uses as much as digits as its factorization.

719688091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 217728, while the sum is 49.

The square root of 719688091 is about 26827.0030193460. The cubic root of 719688091 is about 896.1515055739.

The spelling of 719688091 in words is "seven hundred nineteen million, six hundred eighty-eight thousand, ninety-one".