78303299 has 4 divisors (see below), whose sum is σ = 79294560. Its totient is φ = 77312040.

The previous prime is 78303289. The next prime is 78303307. The reversal of 78303299 is 99230387.

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 78303299 - 2⁴ = 78303283 is a prime.

It is a super-2 number, since 2×78303299² = 12262813268566802, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78303209) 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, 495512 + ... + 495669.

It is an arithmetic number, because the mean of its divisors is an integer number (19823640).

Almost surely, 2^78303299 is an apocalyptic number.

78303299 is a gapful number since it is divisible by the number (79) formed by its first and last digit.

78303299 is a deficient number, since it is larger than the sum of its proper divisors (991261).

78303299 is an equidigital number, since it uses as much as digits as its factorization.

78303299 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 991260.

The product of its (nonzero) digits is 81648, while the sum is 41.

The square root of 78303299 is about 8848.9151312463. The cubic root of 78303299 is about 427.8189523806.

The spelling of 78303299 in words is "seventy-eight million, three hundred three thousand, two hundred ninety-nine".