78283379 has 4 divisors (see below), whose sum is σ = 80399184. Its totient is φ = 76167576.

The previous prime is 78283367. The next prime is 78283409. The reversal of 78283379 is 97338287.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78283379 is a prime.

It is a super-2 number, since 2×78283379² = 12256574855315282, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78283319) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1057847 + ... + 1057920.

It is an arithmetic number, because the mean of its divisors is an integer number (20099796).

Almost surely, 2^78283379 is an apocalyptic number.

78283379 is a deficient number, since it is larger than the sum of its proper divisors (2115805).

78283379 is a wasteful number, since it uses less digits than its factorization.

78283379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2115804.

The product of its digits is 508032, while the sum is 47.

The square root of 78283379 is about 8847.7894979481. The cubic root of 78283379 is about 427.7826709110.

The spelling of 78283379 in words is "seventy-eight million, two hundred eighty-three thousand, three hundred seventy-nine".