78349117 has 16 divisors (see below), whose sum is σ = 98352000. Its totient is φ = 60632640.

The previous prime is 78349111. The next prime is 78349127. The reversal of 78349117 is 71194387.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78349117 is a prime.

It is a super-2 number, since 2×78349117² = 12277168269359378, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 78349117.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78349111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8059 + ... + 14887.

It is an arithmetic number, because the mean of its divisors is an integer number (6147000).

Almost surely, 2^78349117 is an apocalyptic number.

78349117 is a gapful number since it is divisible by the number (77) formed by its first and last digit.

It is an amenable number.

78349117 is a deficient number, since it is larger than the sum of its proper divisors (20002883).

78349117 is a wasteful number, since it uses less digits than its factorization.

78349117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6996.

The product of its digits is 42336, while the sum is 40.

The square root of 78349117 is about 8851.5036575714. The cubic root of 78349117 is about 427.9023800566.

The spelling of 78349117 in words is "seventy-eight million, three hundred forty-nine thousand, one hundred seventeen".