78949 has 4 divisors (see below), whose sum is σ = 85036. Its totient is φ = 72864.

The previous prime is 78941. The next prime is 78977. The reversal of 78949 is 94987.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 42849 + 36100 = 207^2 + 190^2 .

It is a cyclic number.

It is not a de Polignac number, because 78949 - 2³ = 78941 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78941) 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, 3024 + ... + 3049.

It is an arithmetic number, because the mean of its divisors is an integer number (21259).

2⁷⁸⁹⁴⁹ is an apocalyptic number.

It is an amenable number.

78949 is a deficient number, since it is larger than the sum of its proper divisors (6087).

78949 is a wasteful number, since it uses less digits than its factorization.

78949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6086.

The product of its digits is 18144, while the sum is 37.

The square root of 78949 is about 280.9786468755. The cubic root of 78949 is about 42.8991688285.

It can be divided in two parts, 789 and 49, that added together give a palindrome (838).

The spelling of 78949 in words is "seventy-eight thousand, nine hundred forty-nine".