78269229 has 6 divisors (see below), whose sum is σ = 113055566. Its totient is φ = 52179480.

The previous prime is 78269221. The next prime is 78269237. The reversal of 78269229 is 92296287.

It is an interprime number because it is at equal distance from previous prime (78269221) and next prime (78269237).

It can be written as a sum of positive squares in only one way, i.e., 53319204 + 24950025 = 7302^2 + 4995^2 .

It is not a de Polignac number, because 78269229 - 2³ = 78269221 is a prime.

It is a super-2 number, since 2×78269229² = 12252144416508882, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78269221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4348282 + ... + 4348299.

Almost surely, 2^78269229 is an apocalyptic number.

It is an amenable number.

78269229 is a deficient number, since it is larger than the sum of its proper divisors (34786337).

78269229 is a wasteful number, since it uses less digits than its factorization.

78269229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8696587 (or 8696584 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The square root of 78269229 is about 8846.9898270542. The cubic root of 78269229 is about 427.7568949433.

The spelling of 78269229 in words is "seventy-eight million, two hundred sixty-nine thousand, two hundred twenty-nine".