112778309 has 8 divisors (see below), whose sum is σ = 129030528. Its totient is φ = 96561360.

The previous prime is 112778299. The next prime is 112778339. The reversal of 112778309 is 903877211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 112778309 - 2¹⁶ = 112712773 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (112778339) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1562 + ... + 15099.

It is an arithmetic number, because the mean of its divisors is an integer number (16128816).

Almost surely, 2^112778309 is an apocalyptic number.

It is an amenable number.

112778309 is a deficient number, since it is larger than the sum of its proper divisors (16252219).

112778309 is an equidigital number, since it uses as much as digits as its factorization.

112778309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17635.

The product of its (nonzero) digits is 21168, while the sum is 38.

The square root of 112778309 is about 10619.7132258833. The cubic root of 112778309 is about 483.1424450589.

The spelling of 112778309 in words is "one hundred twelve million, seven hundred seventy-eight thousand, three hundred nine".