719915139 has 12 divisors (see below), whose sum is σ = 1073422272. Its totient is φ = 464461200.

The previous prime is 719915129. The next prime is 719915143. The reversal of 719915139 is 931519917.

It is a happy number.

It is not a de Polignac number, because 719915139 - 2⁹ = 719914627 is a prime.

It is a super-2 number, since 2×719915139² = 1036555614722778642, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 719915094 and 719915103.

It is not an unprimeable number, because it can be changed into a prime (719915129) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1289892 + ... + 1290449.

It is an arithmetic number, because the mean of its divisors is an integer number (89451856).

Almost surely, 2^719915139 is an apocalyptic number.

719915139 is a deficient number, since it is larger than the sum of its proper divisors (353507133).

719915139 is a wasteful number, since it uses less digits than its factorization.

719915139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2580378 (or 2580375 counting only the distinct ones).

The product of its digits is 76545, while the sum is 45.

The square root of 719915139 is about 26831.2343920290. The cubic root of 719915139 is about 896.2457352901.

The spelling of 719915139 in words is "seven hundred nineteen million, nine hundred fifteen thousand, one hundred thirty-nine".