156234649 has 2 divisors, whose sum is σ = 156234650. Its totient is φ = 156234648.

The previous prime is 156234643. The next prime is 156234671. The reversal of 156234649 is 946432651.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 86211225 + 70023424 = 9285^2 + 8368^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-156234649 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (156234643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78117324 + 78117325.

It is an arithmetic number, because the mean of its divisors is an integer number (78117325).

Almost surely, 2^156234649 is an apocalyptic number.

It is an amenable number.

156234649 is a deficient number, since it is larger than the sum of its proper divisors (1).

156234649 is an equidigital number, since it uses as much as digits as its factorization.

156234649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 155520, while the sum is 40.

The square root of 156234649 is about 12499.3859449175. The cubic root of 156234649 is about 538.5910331426.

The spelling of 156234649 in words is "one hundred fifty-six million, two hundred thirty-four thousand, six hundred forty-nine".