1236961147 has 2 divisors, whose sum is σ = 1236961148. Its totient is φ = 1236961146.

The previous prime is 1236961073. The next prime is 1236961189. The reversal of 1236961147 is 7411696321.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1236961147 is a prime.

It is not a weakly prime, because it can be changed into another prime (1236961247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 618480573 + 618480574.

It is an arithmetic number, because the mean of its divisors is an integer number (618480574).

Almost surely, 2^1236961147 is an apocalyptic number.

1236961147 is a deficient number, since it is larger than the sum of its proper divisors (1).

1236961147 is an equidigital number, since it uses as much as digits as its factorization.

1236961147 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54432, while the sum is 40.

The square root of 1236961147 is about 35170.4584417093. The cubic root of 1236961147 is about 1073.4587314644.

The spelling of 1236961147 in words is "one billion, two hundred thirty-six million, nine hundred sixty-one thousand, one hundred forty-seven".