78951949 has 8 divisors (see below), whose sum is σ = 81776160. Its totient is φ = 76134576.

The previous prime is 78951931. The next prime is 78951959. The reversal of 78951949 is 94915987.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 78951949 - 2⁹ = 78951437 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 78951896 and 78951905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78951919) 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 7 ways as a sum of consecutive naturals, for example, 36862 + ... + 38944.

It is an arithmetic number, because the mean of its divisors is an integer number (10222020).

Almost surely, 2^78951949 is an apocalyptic number.

It is an amenable number.

78951949 is a deficient number, since it is larger than the sum of its proper divisors (2824211).

78951949 is a wasteful number, since it uses less digits than its factorization.

78951949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3419.

The product of its digits is 816480, while the sum is 52.

The square root of 78951949 is about 8885.4909262235. The cubic root of 78951949 is about 428.9970296268.

The spelling of 78951949 in words is "seventy-eight million, nine hundred fifty-one thousand, nine hundred forty-nine".