78009349 has 8 divisors (see below), whose sum is σ = 85222080. Its totient is φ = 70816800.

The previous prime is 78009341. The next prime is 78009359. The reversal of 78009349 is 94390087.

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 78009349 - 2³ = 78009341 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78009341) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3712 + ... + 13030.

It is an arithmetic number, because the mean of its divisors is an integer number (10652760).

Almost surely, 2^78009349 is an apocalyptic number.

It is an amenable number.

78009349 is a deficient number, since it is larger than the sum of its proper divisors (7212731).

78009349 is a wasteful number, since it uses less digits than its factorization.

78009349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10091.

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 78009349 is about 8832.2901333686. The cubic root of 78009349 is about 427.2829380374.

The spelling of 78009349 in words is "seventy-eight million, nine thousand, three hundred forty-nine".