731838139 has 2 divisors, whose sum is σ = 731838140. Its totient is φ = 731838138.

The previous prime is 731838103. The next prime is 731838157. The reversal of 731838139 is 931838137.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 731838139 - 2¹³ = 731829947 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 731838095 and 731838104.

It is not a weakly prime, because it can be changed into another prime (731838169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 365919069 + 365919070.

It is an arithmetic number, because the mean of its divisors is an integer number (365919070).

Almost surely, 2^731838139 is an apocalyptic number.

731838139 is a deficient number, since it is larger than the sum of its proper divisors (1).

731838139 is an equidigital number, since it uses as much as digits as its factorization.

731838139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108864, while the sum is 43.

The square root of 731838139 is about 27052.5070742066. The cubic root of 731838139 is about 901.1664460094.

The spelling of 731838139 in words is "seven hundred thirty-one million, eight hundred thirty-eight thousand, one hundred thirty-nine".