78232793 has 4 divisors (see below), whose sum is σ = 82834740. Its totient is φ = 73630848.

The previous prime is 78232789. The next prime is 78232811. The reversal of 78232793 is 39723287.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 39723287 = 137 ⋅289951.

It can be written as a sum of positive squares in 2 ways, for example, as 56731024 + 21501769 = 7532^2 + 4637^2 .

It is a cyclic number.

It is not a de Polignac number, because 78232793 - 2² = 78232789 is a prime.

It is a super-2 number, since 2×78232793² = 12240739801161698, 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 78232793.

It is not an unprimeable number, because it can be changed into a prime (78232703) 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, 2300948 + ... + 2300981.

It is an arithmetic number, because the mean of its divisors is an integer number (20708685).

Almost surely, 2^78232793 is an apocalyptic number.

It is an amenable number.

78232793 is a deficient number, since it is larger than the sum of its proper divisors (4601947).

78232793 is a wasteful number, since it uses less digits than its factorization.

78232793 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4601946.

The product of its digits is 127008, while the sum is 41.

The square root of 78232793 is about 8844.9303558592. The cubic root of 78232793 is about 427.6905079798.

The spelling of 78232793 in words is "seventy-eight million, two hundred thirty-two thousand, seven hundred ninety-three".