102719005 has 4 divisors (see below), whose sum is σ = 123262812. Its totient is φ = 82175200.

The previous prime is 102719003. The next prime is 102719011. The reversal of 102719005 is 500917201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 500917201 = 83 ⋅6035147.

It can be written as a sum of positive squares in 2 ways, for example, as 11363641 + 91355364 = 3371^2 + 9558^2 .

It is not a de Polignac number, because 102719005 - 2¹ = 102719003 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102719003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10271896 + ... + 10271905.

It is an arithmetic number, because the mean of its divisors is an integer number (30815703).

Almost surely, 2^102719005 is an apocalyptic number.

It is an amenable number.

102719005 is a deficient number, since it is larger than the sum of its proper divisors (20543807).

102719005 is an equidigital number, since it uses as much as digits as its factorization.

102719005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20543806.

The product of its (nonzero) digits is 630, while the sum is 25.

The square root of 102719005 is about 10135.0384804400. The cubic root of 102719005 is about 468.3281554738.

The spelling of 102719005 in words is "one hundred two million, seven hundred nineteen thousand, five".