139693378 has 32 divisors (see below), whose sum is σ = 237178368. Its totient is φ = 61132800.

The previous prime is 139693373. The next prime is 139693387. The reversal of 139693378 is 873396931.

It is not an unprimeable number, because it can be changed into a prime (139693373) 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 15 ways as a sum of consecutive naturals, for example, 174876 + ... + 175672.

It is an arithmetic number, because the mean of its divisors is an integer number (7411824).

Almost surely, 2^139693378 is an apocalyptic number.

139693378 is a deficient number, since it is larger than the sum of its proper divisors (97484990).

139693378 is a wasteful number, since it uses less digits than its factorization.

139693378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1098.

The product of its digits is 734832, while the sum is 49.

The square root of 139693378 is about 11819.1953194792. The cubic root of 139693378 is about 518.8700538319.

The spelling of 139693378 in words is "one hundred thirty-nine million, six hundred ninety-three thousand, three hundred seventy-eight".