78248473 has 4 divisors (see below), whose sum is σ = 79239040. Its totient is φ = 77257908.

The previous prime is 78248453. The next prime is 78248477. The reversal of 78248473 is 37484287.

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: 37484287 = 509 ⋅73643.

It is a cyclic number.

It is not a de Polignac number, because 78248473 - 2¹⁷ = 78117401 is a prime.

It is a super-2 number, since 2×78248473² = 12245647053663458, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78248477) 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, 495165 + ... + 495322.

It is an arithmetic number, because the mean of its divisors is an integer number (19809760).

Almost surely, 2^78248473 is an apocalyptic number.

It is an amenable number.

78248473 is a deficient number, since it is larger than the sum of its proper divisors (990567).

78248473 is an equidigital number, since it uses as much as digits as its factorization.

78248473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 990566.

The product of its digits is 301056, while the sum is 43.

The square root of 78248473 is about 8845.8166949129. The cubic root of 78248473 is about 427.7190797118.

The spelling of 78248473 in words is "seventy-eight million, two hundred forty-eight thousand, four hundred seventy-three".