78241773 has 4 divisors (see below), whose sum is σ = 104322368. Its totient is φ = 52161180.

The previous prime is 78241759. The next prime is 78241783. The reversal of 78241773 is 37714287.

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 not a de Polignac number, because 78241773 - 2⁵ = 78241741 is a prime.

It is a super-2 number, since 2×78241773² = 12243550084367058, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78241733) 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, 13040293 + ... + 13040298.

It is an arithmetic number, because the mean of its divisors is an integer number (26080592).

Almost surely, 2^78241773 is an apocalyptic number.

It is an amenable number.

78241773 is a deficient number, since it is larger than the sum of its proper divisors (26080595).

78241773 is a wasteful number, since it uses less digits than its factorization.

78241773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26080594.

The product of its digits is 65856, while the sum is 39.

The square root of 78241773 is about 8845.4379767200. The cubic root of 78241773 is about 427.7068715944.

The spelling of 78241773 in words is "seventy-eight million, two hundred forty-one thousand, seven hundred seventy-three".