78369933 has 8 divisors (see below), whose sum is σ = 106206496. Its totient is φ = 51390000.

The previous prime is 78369931. The next prime is 78369943. The reversal of 78369933 is 33996387.

It is a happy number.

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

It is not a de Polignac number, because 78369933 - 2¹ = 78369931 is a prime.

It is a super-2 number, since 2×78369933² = 12283692796848978, 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 (78369931) 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, 213943 + ... + 214308.

It is an arithmetic number, because the mean of its divisors is an integer number (13275812).

Almost surely, 2^78369933 is an apocalyptic number.

It is an amenable number.

78369933 is a deficient number, since it is larger than the sum of its proper divisors (27836563).

78369933 is a wasteful number, since it uses less digits than its factorization.

78369933 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428315.

The product of its digits is 734832, while the sum is 48.

The square root of 78369933 is about 8852.6794248973. The cubic root of 78369933 is about 427.9402721119.

The spelling of 78369933 in words is "seventy-eight million, three hundred sixty-nine thousand, nine hundred thirty-three".