78341889 has 4 divisors (see below), whose sum is σ = 104455856. Its totient is φ = 52227924.

The previous prime is 78341881. The next prime is 78341891. The reversal of 78341889 is 98814387.

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 78341889 - 2³ = 78341881 is a prime.

It is a super-2 number, since 2×78341889² = 12274903144176642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78341881) 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, 13056979 + ... + 13056984.

It is an arithmetic number, because the mean of its divisors is an integer number (26113964).

Almost surely, 2^78341889 is an apocalyptic number.

It is an amenable number.

78341889 is a deficient number, since it is larger than the sum of its proper divisors (26113967).

78341889 is a wasteful number, since it uses less digits than its factorization.

78341889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26113966.

The product of its digits is 387072, while the sum is 48.

The square root of 78341889 is about 8851.0953559432. The cubic root of 78341889 is about 427.8892211186.

The spelling of 78341889 in words is "seventy-eight million, three hundred forty-one thousand, eight hundred eighty-nine".