83978674 has 16 divisors (see below), whose sum is σ = 143638488. Its totient is φ = 36479232.

The previous prime is 83978669. The next prime is 83978677. The reversal of 83978674 is 47687938.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 46854025 + 37124649 = 6845^2 + 6093^2 .

It is not an unprimeable number, because it can be changed into a prime (83978677) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94557 + ... + 95440.

Almost surely, 2^83978674 is an apocalyptic number.

83978674 is a deficient number, since it is larger than the sum of its proper divisors (59659814).

83978674 is a wasteful number, since it uses less digits than its factorization.

83978674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190029.

The product of its digits is 2032128, while the sum is 52.

The square root of 83978674 is about 9163.9878873774. The cubic root of 83978674 is about 437.9148483022.

It can be divided in two parts, 8397 and 8674, that added together give a palindrome (17071).

The spelling of 83978674 in words is "eighty-three million, nine hundred seventy-eight thousand, six hundred seventy-four".