156284749 has 4 divisors (see below), whose sum is σ = 156727836. Its totient is φ = 155841664.

The previous prime is 156284717. The next prime is 156284753. The reversal of 156284749 is 947482651.

156284749 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 114875524 + 41409225 = 10718^2 + 6435^2 .

It is a cyclic number.

It is not a de Polignac number, because 156284749 - 2⁵ = 156284717 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 156284699 and 156284708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (156204749) 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, 221014 + ... + 221719.

It is an arithmetic number, because the mean of its divisors is an integer number (39181959).

Almost surely, 2^156284749 is an apocalyptic number.

It is an amenable number.

156284749 is a deficient number, since it is larger than the sum of its proper divisors (443087).

156284749 is an equidigital number, since it uses as much as digits as its factorization.

156284749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 443086.

The product of its digits is 483840, while the sum is 46.

The square root of 156284749 is about 12501.3898827290. The cubic root of 156284749 is about 538.6485972557.

The spelling of 156284749 in words is "one hundred fifty-six million, two hundred eighty-four thousand, seven hundred forty-nine".