78346459 has 4 divisors (see below), whose sum is σ = 78521400. Its totient is φ = 78171520.

The previous prime is 78346399. The next prime is 78346507. The reversal of 78346459 is 95464387.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 95464387 = 1381 ⋅69127.

It is a cyclic number.

It is not a de Polignac number, because 78346459 - 2⁹ = 78345947 is a prime.

It is a super-2 number, since 2×78346459² = 12276335275677362, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78340459) 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, 86797 + ... + 87694.

It is an arithmetic number, because the mean of its divisors is an integer number (19630350).

Almost surely, 2^78346459 is an apocalyptic number.

78346459 is a deficient number, since it is larger than the sum of its proper divisors (174941).

78346459 is a wasteful number, since it uses less digits than its factorization.

78346459 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174940.

The product of its digits is 725760, while the sum is 46.

The square root of 78346459 is about 8851.3535123166. The cubic root of 78346459 is about 427.8975411278.

The spelling of 78346459 in words is "seventy-eight million, three hundred forty-six thousand, four hundred fifty-nine".