139420023 has 8 divisors (see below), whose sum is σ = 192303600. Its totient is φ = 89741568.

The previous prime is 139420019. The next prime is 139420027. The reversal of 139420023 is 320024931.

It is an interprime number because it is at equal distance from previous prime (139420019) and next prime (139420027).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 139420023 - 2² = 139420019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 139419975 and 139420002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139420027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 801178 + ... + 801351.

It is an arithmetic number, because the mean of its divisors is an integer number (24037950).

Almost surely, 2^139420023 is an apocalyptic number.

139420023 is a deficient number, since it is larger than the sum of its proper divisors (52883577).

139420023 is a wasteful number, since it uses less digits than its factorization.

139420023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1602561.

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 139420023 is about 11807.6256292279. The cubic root of 139420023 is about 518.5313874804.

Adding to 139420023 its reverse (320024931), we get a palindrome (459444954).

The spelling of 139420023 in words is "one hundred thirty-nine million, four hundred twenty thousand, twenty-three".