719896121 has 4 divisors (see below), whose sum is σ = 822738432. Its totient is φ = 617053812.

The previous prime is 719896109. The next prime is 719896141. The reversal of 719896121 is 121698917.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 121698917 = 197 ⋅617761.

It is a cyclic number.

It is not a de Polignac number, because 719896121 - 2¹⁸ = 719633977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (719896141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51421145 + ... + 51421158.

It is an arithmetic number, because the mean of its divisors is an integer number (205684608).

Almost surely, 2^719896121 is an apocalyptic number.

It is an amenable number.

719896121 is a deficient number, since it is larger than the sum of its proper divisors (102842311).

719896121 is a wasteful number, since it uses less digits than its factorization.

719896121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102842310.

The product of its digits is 54432, while the sum is 44.

The square root of 719896121 is about 26830.8799892959. The cubic root of 719896121 is about 896.2378431787.

The spelling of 719896121 in words is "seven hundred nineteen million, eight hundred ninety-six thousand, one hundred twenty-one".