135856739 has 6 divisors (see below), whose sum is σ = 139252860. Its totient is φ = 132541520.

The previous prime is 135856717. The next prime is 135856789. The reversal of 135856739 is 937658531.

It is not a de Polignac number, because 135856739 - 2¹² = 135852643 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 135856693 and 135856702.

It is not an unprimeable number, because it can be changed into a prime (135856709) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 38729 + ... + 42090.

It is an arithmetic number, because the mean of its divisors is an integer number (23208810).

Almost surely, 2^135856739 is an apocalyptic number.

135856739 is a deficient number, since it is larger than the sum of its proper divisors (3396121).

135856739 is an frugal number, since it uses more digits than its factorization.

135856739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80901 (or 80860 counting only the distinct ones).

The product of its digits is 680400, while the sum is 47.

The square root of 135856739 is about 11655.7599065870. The cubic root of 135856739 is about 514.0756839202.

The spelling of 135856739 in words is "one hundred thirty-five million, eight hundred fifty-six thousand, seven hundred thirty-nine".