78484031 has 4 divisors (see below), whose sum is σ = 80153952. Its totient is φ = 76814112.

The previous prime is 78484009. The next prime is 78484061. The reversal of 78484031 is 13048487.

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-78484031 is a prime.

It is a super-2 number, since 2×78484031² = 12319486244017922, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 12.

It is a junction number, because it is equal to n+sod(n) for n = 78483982 and 78484000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78484061) 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, 834890 + ... + 834983.

It is an arithmetic number, because the mean of its divisors is an integer number (20038488).

Almost surely, 2^78484031 is an apocalyptic number.

78484031 is a deficient number, since it is larger than the sum of its proper divisors (1669921).

78484031 is a wasteful number, since it uses less digits than its factorization.

78484031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1669920.

The product of its (nonzero) digits is 21504, while the sum is 35.

The square root of 78484031 is about 8859.1213446933. The cubic root of 78484031 is about 428.1478493923.

The spelling of 78484031 in words is "seventy-eight million, four hundred eighty-four thousand, thirty-one".