78212633 has 8 divisors (see below), whose sum is σ = 79358400. Its totient is φ = 77075440.

The previous prime is 78212609. The next prime is 78212639. The reversal of 78212633 is 33621287.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 78212633 - 2⁸ = 78212377 is a prime.

It is a super-2 number, since 2×78212633² = 12234431921585378, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 78212633.

It is not an unprimeable number, because it can be changed into a prime (78212639) 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 7 ways as a sum of consecutive naturals, for example, 17516 + ... + 21522.

It is an arithmetic number, because the mean of its divisors is an integer number (9919800).

Almost surely, 2^78212633 is an apocalyptic number.

It is an amenable number.

78212633 is a deficient number, since it is larger than the sum of its proper divisors (1145767).

78212633 is a wasteful number, since it uses less digits than its factorization.

78212633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4287.

The product of its digits is 12096, while the sum is 32.

The square root of 78212633 is about 8843.7906465497. The cubic root of 78212633 is about 427.6537672856.

The spelling of 78212633 in words is "seventy-eight million, two hundred twelve thousand, six hundred thirty-three".