78414909 has 8 divisors (see below), whose sum is σ = 104613120. Its totient is φ = 52246656.

The previous prime is 78414907. The next prime is 78414911. The reversal of 78414909 is 90941487.

It is an interprime number because it is at equal distance from previous prime (78414907) and next prime (78414911).

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

It is not a de Polignac number, because 78414909 - 2¹ = 78414907 is a prime.

It is a super-2 number, since 2×78414909² = 12297795906956562, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78414901) 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, 429 + ... + 12530.

It is an arithmetic number, because the mean of its divisors is an integer number (13076640).

Almost surely, 2^78414909 is an apocalyptic number.

It is an amenable number.

78414909 is a deficient number, since it is larger than the sum of its proper divisors (26198211).

78414909 is a wasteful number, since it uses less digits than its factorization.

78414909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14979.

The product of its (nonzero) digits is 72576, while the sum is 42.

The square root of 78414909 is about 8855.2193084079. The cubic root of 78414909 is about 428.0221205122.

The spelling of 78414909 in words is "seventy-eight million, four hundred fourteen thousand, nine hundred nine".