78431433 has 4 divisors (see below), whose sum is σ = 104575248. Its totient is φ = 52287620.

The previous prime is 78431417. The next prime is 78431447. The reversal of 78431433 is 33413487.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 78431433 - 2⁴ = 78431417 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 78431394 and 78431403.

It is not an unprimeable number, because it can be changed into a prime (78431233) 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, 13071903 + ... + 13071908.

It is an arithmetic number, because the mean of its divisors is an integer number (26143812).

Almost surely, 2^78431433 is an apocalyptic number.

It is an amenable number.

78431433 is a deficient number, since it is larger than the sum of its proper divisors (26143815).

78431433 is a wasteful number, since it uses less digits than its factorization.

78431433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26143814.

The product of its digits is 24192, while the sum is 33.

The square root of 78431433 is about 8856.1522683387. The cubic root of 78431433 is about 428.0521834210.

The spelling of 78431433 in words is "seventy-eight million, four hundred thirty-one thousand, four hundred thirty-three".