139157782 has 4 divisors (see below), whose sum is σ = 208736676. Its totient is φ = 69578890.

The previous prime is 139157773. The next prime is 139157803. The reversal of 139157782 is 287751931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 287751931 = 3371 ⋅85361.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 34789444 + ... + 34789447.

It is an arithmetic number, because the mean of its divisors is an integer number (52184169).

Almost surely, 2^139157782 is an apocalyptic number.

139157782 is a deficient number, since it is larger than the sum of its proper divisors (69578894).

139157782 is an equidigital number, since it uses as much as digits as its factorization.

139157782 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69578893.

The product of its digits is 105840, while the sum is 43.

The square root of 139157782 is about 11796.5156720110. The cubic root of 139157782 is about 518.2060742463.

The spelling of 139157782 in words is "one hundred thirty-nine million, one hundred fifty-seven thousand, seven hundred eighty-two".