1232161639 has 2 divisors, whose sum is σ = 1232161640. Its totient is φ = 1232161638.

The previous prime is 1232161621. The next prime is 1232161669. The reversal of 1232161639 is 9361612321.

It is a weak prime.

It is an emirp because it is prime and its reverse (9361612321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1232161639 - 2⁵ = 1232161607 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1232161669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 616080819 + 616080820.

It is an arithmetic number, because the mean of its divisors is an integer number (616080820).

Almost surely, 2^1232161639 is an apocalyptic number.

1232161639 is a deficient number, since it is larger than the sum of its proper divisors (1).

1232161639 is an equidigital number, since it uses as much as digits as its factorization.

1232161639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11664, while the sum is 34.

The square root of 1232161639 is about 35102.1600332515. The cubic root of 1232161639 is about 1072.0685633985.

The spelling of 1232161639 in words is "one billion, two hundred thirty-two million, one hundred sixty-one thousand, six hundred thirty-nine".