78403133 has 8 divisors (see below), whose sum is σ = 83231352. Its totient is φ = 73598976.

The previous prime is 78403121. The next prime is 78403181. The reversal of 78403133 is 33130487.

It can be written as a sum of positive squares in 4 ways, for example, as 21279769 + 57123364 = 4613^2 + 7558^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 78403133 - 2¹² = 78399037 is a prime.

It is a super-2 number, since 2×78403133² = 12294102528431378, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 78403096 and 78403105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78403103) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 941 + ... + 12557.

It is an arithmetic number, because the mean of its divisors is an integer number (10403919).

Almost surely, 2^78403133 is an apocalyptic number.

It is an amenable number.

78403133 is a deficient number, since it is larger than the sum of its proper divisors (4828219).

78403133 is a wasteful number, since it uses less digits than its factorization.

78403133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12031.

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 78403133 is about 8854.5543648452. The cubic root of 78403133 is about 428.0006932909. Note that the first 3 decimals are identical.

The spelling of 78403133 in words is "seventy-eight million, four hundred three thousand, one hundred thirty-three".