78231459 has 4 divisors (see below), whose sum is σ = 104308616. Its totient is φ = 52154304.

The previous prime is 78231451. The next prime is 78231481. The reversal of 78231459 is 95413287.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 95413287 = 3 ⋅31804429.

It is not a de Polignac number, because 78231459 - 2³ = 78231451 is a prime.

It is a super-2 number, since 2×78231459² = 12240322354537362, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78231451) 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, 13038574 + ... + 13038579.

It is an arithmetic number, because the mean of its divisors is an integer number (26077154).

Almost surely, 2^78231459 is an apocalyptic number.

78231459 is a deficient number, since it is larger than the sum of its proper divisors (26077157).

78231459 is a wasteful number, since it uses less digits than its factorization.

78231459 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26077156.

The product of its digits is 60480, while the sum is 39.

The square root of 78231459 is about 8844.8549451079. The cubic root of 78231459 is about 427.6880770197.

The spelling of 78231459 in words is "seventy-eight million, two hundred thirty-one thousand, four hundred fifty-nine".