1139235641 has 2 divisors, whose sum is σ = 1139235642. Its totient is φ = 1139235640.

The previous prime is 1139235613. The next prime is 1139235653. The reversal of 1139235641 is 1465329311.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 899760016 + 239475625 = 29996^2 + 15475^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1139235641 is a prime.

It is not a weakly prime, because it can be changed into another prime (1139235941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 569617820 + 569617821.

It is an arithmetic number, because the mean of its divisors is an integer number (569617821).

Almost surely, 2^1139235641 is an apocalyptic number.

It is an amenable number.

1139235641 is a deficient number, since it is larger than the sum of its proper divisors (1).

1139235641 is an equidigital number, since it uses as much as digits as its factorization.

1139235641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19440, while the sum is 35.

The square root of 1139235641 is about 33752.5649543853. The cubic root of 1139235641 is about 1044.4104000644.

The spelling of 1139235641 in words is "one billion, one hundred thirty-nine million, two hundred thirty-five thousand, six hundred forty-one".