72102469 has 4 divisors (see below), whose sum is σ = 72147340. Its totient is φ = 72057600.

The previous prime is 72102451. The next prime is 72102479. The reversal of 72102469 is 96420127.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 96420127 = 373 ⋅258499.

It can be written as a sum of positive squares in 2 ways, for example, as 44382244 + 27720225 = 6662^2 + 5265^2 .

It is a cyclic number.

It is not a de Polignac number, because 72102469 - 2²³ = 63713861 is a prime.

It is a super-2 number, since 2×72102469² = 10397532071791922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 72102469.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72102449) 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, 19932 + ... + 23269.

It is an arithmetic number, because the mean of its divisors is an integer number (18036835).

Almost surely, 2^72102469 is an apocalyptic number.

It is an amenable number.

72102469 is a deficient number, since it is larger than the sum of its proper divisors (44871).

72102469 is a wasteful number, since it uses less digits than its factorization.

72102469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44870.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 72102469 is about 8491.3172711894. The cubic root of 72102469 is about 416.2140267168.

The spelling of 72102469 in words is "seventy-two million, one hundred two thousand, four hundred sixty-nine".