78293473 has 4 divisors (see below), whose sum is σ = 78427440. Its totient is φ = 78159508.

The previous prime is 78293461. The next prime is 78293489. The reversal of 78293473 is 37439287.

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, and also an emirpimes, since its reverse is a distinct semiprime: 37439287 = 17 ⋅2202311.

It is a cyclic number.

It is not a de Polignac number, because 78293473 - 2¹³ = 78285281 is a prime.

It is a super-2 number, since 2×78293473² = 12259735828803458, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78290473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66103 + ... + 67276.

It is an arithmetic number, because the mean of its divisors is an integer number (19606860).

Almost surely, 2^78293473 is an apocalyptic number.

It is an amenable number.

78293473 is a deficient number, since it is larger than the sum of its proper divisors (133967).

78293473 is a wasteful number, since it uses less digits than its factorization.

78293473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133966.

The product of its digits is 254016, while the sum is 43.

The square root of 78293473 is about 8848.3599045247. The cubic root of 78293473 is about 427.8010564770.

The spelling of 78293473 in words is "seventy-eight million, two hundred ninety-three thousand, four hundred seventy-three".