78954269 has 4 divisors (see below), whose sum is σ = 81676860. Its totient is φ = 76231680.

The previous prime is 78954247. The next prime is 78954287. The reversal of 78954269 is 96245987.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18705625 + 60248644 = 4325^2 + 7762^2 .

It is a cyclic number.

It is not a de Polignac number, because 78954269 - 2⁸ = 78954013 is a prime.

It is a super-2 number, since 2×78954269² = 12467553186648722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78954209) 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, 1361252 + ... + 1361309.

It is an arithmetic number, because the mean of its divisors is an integer number (20419215).

Almost surely, 2^78954269 is an apocalyptic number.

It is an amenable number.

78954269 is a deficient number, since it is larger than the sum of its proper divisors (2722591).

78954269 is a wasteful number, since it uses less digits than its factorization.

78954269 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2722590.

The product of its digits is 1088640, while the sum is 50.

The square root of 78954269 is about 8885.6214751699. The cubic root of 78954269 is about 429.0012316061.

The spelling of 78954269 in words is "seventy-eight million, nine hundred fifty-four thousand, two hundred sixty-nine".