78130407 has 4 divisors (see below), whose sum is σ = 104173880. Its totient is φ = 52086936.

The previous prime is 78130399. The next prime is 78130463. The reversal of 78130407 is 70403187.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70403187 = 3 ⋅23467729.

It is not a de Polignac number, because 78130407 - 2³ = 78130399 is a prime.

It is a super-2 number, since 2×78130407² = 12208720995971298, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78130477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13021732 + ... + 13021737.

It is an arithmetic number, because the mean of its divisors is an integer number (26043470).

Almost surely, 2^78130407 is an apocalyptic number.

78130407 is a deficient number, since it is larger than the sum of its proper divisors (26043473).

78130407 is a wasteful number, since it uses less digits than its factorization.

78130407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26043472.

The product of its (nonzero) digits is 4704, while the sum is 30.

The square root of 78130407 is about 8839.1406256491. The cubic root of 78130407 is about 427.5038486709.

The spelling of 78130407 in words is "seventy-eight million, one hundred thirty thousand, four hundred seven".