1712139731 has 4 divisors (see below), whose sum is σ = 1718650032. Its totient is φ = 1705629432.

The previous prime is 1712139721. The next prime is 1712139743. The reversal of 1712139731 is 1379312171.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1712139731 is a prime.

It is a super-2 number, since 2×1712139731² = 5862844916937504722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1712139691 and 1712139700.

It is not an unprimeable number, because it can be changed into a prime (1712139721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3254756 + ... + 3255281.

It is an arithmetic number, because the mean of its divisors is an integer number (429662508).

Almost surely, 2^1712139731 is an apocalyptic number.

1712139731 is a deficient number, since it is larger than the sum of its proper divisors (6510301).

1712139731 is an equidigital number, since it uses as much as digits as its factorization.

1712139731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6510300.

The product of its digits is 7938, while the sum is 35.

The square root of 1712139731 is about 41378.0102349062. The cubic root of 1712139731 is about 1196.3173514124.

The spelling of 1712139731 in words is "one billion, seven hundred twelve million, one hundred thirty-nine thousand, seven hundred thirty-one".