78775351 has 4 divisors (see below), whose sum is σ = 79472592. Its totient is φ = 78078112.

The previous prime is 78775343. The next prime is 78775369. The reversal of 78775351 is 15357787.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 78775351 - 2³ = 78775343 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 78775298 and 78775307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78775321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 348451 + ... + 348676.

It is an arithmetic number, because the mean of its divisors is an integer number (19868148).

Almost surely, 2^78775351 is an apocalyptic number.

78775351 is a deficient number, since it is larger than the sum of its proper divisors (697241).

78775351 is a wasteful number, since it uses less digits than its factorization.

78775351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 697240.

The product of its digits is 205800, while the sum is 43.

The square root of 78775351 is about 8875.5479267480. The cubic root of 78775351 is about 428.6769337760.

The spelling of 78775351 in words is "seventy-eight million, seven hundred seventy-five thousand, three hundred fifty-one".