801681739 has 8 divisors (see below), whose sum is σ = 805109040. Its totient is φ = 798262656.

The previous prime is 801681697. The next prime is 801681781. The reversal of 801681739 is 937186108.

It is an interprime number because it is at equal distance from previous prime (801681697) and next prime (801681781).

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

It is a cyclic number.

It is not a de Polignac number, because 801681739 - 2¹¹ = 801679691 is a prime.

It is a super-2 number, since 2×801681739² = 1285387221292128242, 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 = 801681695 and 801681704.

It is not an unprimeable number, because it can be changed into a prime (801681799) 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, 258492 + ... + 261574.

It is an arithmetic number, because the mean of its divisors is an integer number (100638630).

Almost surely, 2^801681739 is an apocalyptic number.

801681739 is a deficient number, since it is larger than the sum of its proper divisors (3427301).

801681739 is a wasteful number, since it uses less digits than its factorization.

801681739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4109.

The product of its (nonzero) digits is 72576, while the sum is 43.

The square root of 801681739 is about 28313.9848661399. The cubic root of 801681739 is about 928.9678065165.

The spelling of 801681739 in words is "eight hundred one million, six hundred eighty-one thousand, seven hundred thirty-nine".