78290299 has 2 divisors, whose sum is σ = 78290300. Its totient is φ = 78290298.

The previous prime is 78290281. The next prime is 78290339. The reversal of 78290299 is 99209287.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78290299 - 2¹⁷ = 78159227 is a prime.

It is a super-2 number, since 2×78290299² = 12258741835018802, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (78290239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39145149 + 39145150.

It is an arithmetic number, because the mean of its divisors is an integer number (39145150).

Almost surely, 2^78290299 is an apocalyptic number.

78290299 is a deficient number, since it is larger than the sum of its proper divisors (1).

78290299 is an equidigital number, since it uses as much as digits as its factorization.

78290299 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 163296, while the sum is 46.

The square root of 78290299 is about 8848.1805474346. The cubic root of 78290299 is about 427.7952754123.

The spelling of 78290299 in words is "seventy-eight million, two hundred ninety thousand, two hundred ninety-nine".