739861 has 2 divisors, whose sum is σ = 739862. Its totient is φ = 739860.

The previous prime is 739859. The next prime is 739909. The reversal of 739861 is 168937.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 731025 + 8836 = 855^2 + 94^2 .

It is an emirp because it is prime and its reverse (168937) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 739861 - 2¹ = 739859 is a prime.

Together with 739859, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (739061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 369930 + 369931.

It is an arithmetic number, because the mean of its divisors is an integer number (369931).

2⁷³⁹⁸⁶¹ is an apocalyptic number.

It is an amenable number.

739861 is a deficient number, since it is larger than the sum of its proper divisors (1).

739861 is an equidigital number, since it uses as much as digits as its factorization.

739861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9072, while the sum is 34.

The square root of 739861 is about 860.1517308010. The cubic root of 739861 is about 90.4447532736. Note that the first 3 decimals are identical.

It can be divided in two parts, 739 and 861, that added together give a square (1600 = 40²).

The spelling of 739861 in words is "seven hundred thirty-nine thousand, eight hundred sixty-one".