78751349 has 4 divisors (see below), whose sum is σ = 78835980. Its totient is φ = 78666720.

The previous prime is 78751297. The next prime is 78751363. The reversal of 78751349 is 94315787.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 94315787 = 467 ⋅201961.

It can be written as a sum of positive squares in 2 ways, for example, as 57866449 + 20884900 = 7607^2 + 4570^2 .

It is a cyclic number.

It is not a de Polignac number, because 78751349 - 2²⁰ = 77702773 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78751369) 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, 40904 + ... + 42785.

It is an arithmetic number, because the mean of its divisors is an integer number (19708995).

Almost surely, 2^78751349 is an apocalyptic number.

It is an amenable number.

78751349 is a deficient number, since it is larger than the sum of its proper divisors (84631).

78751349 is an equidigital number, since it uses as much as digits as its factorization.

78751349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84630.

The product of its digits is 211680, while the sum is 44.

The square root of 78751349 is about 8874.1956818632. The cubic root of 78751349 is about 428.6333916071.

The spelling of 78751349 in words is "seventy-eight million, seven hundred fifty-one thousand, three hundred forty-nine".