161039739 has 8 divisors (see below), whose sum is σ = 245393920. Its totient is φ = 92022696.

The previous prime is 161039737. The next prime is 161039771. The reversal of 161039739 is 937930161.

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

It is not a de Polignac number, because 161039739 - 2¹ = 161039737 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 161039697 and 161039706.

It is not an unprimeable number, because it can be changed into a prime (161039737) 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, 3834259 + ... + 3834300.

It is an arithmetic number, because the mean of its divisors is an integer number (30674240).

Almost surely, 2^161039739 is an apocalyptic number.

161039739 is a deficient number, since it is larger than the sum of its proper divisors (84354181).

161039739 is an equidigital number, since it uses as much as digits as its factorization.

161039739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7668569.

The product of its (nonzero) digits is 30618, while the sum is 39.

The square root of 161039739 is about 12690.1433798047. The cubic root of 161039739 is about 544.0569376589.

The spelling of 161039739 in words is "one hundred sixty-one million, thirty-nine thousand, seven hundred thirty-nine".