1233645461 has 2 divisors, whose sum is σ = 1233645462. Its totient is φ = 1233645460.

The previous prime is 1233645383. The next prime is 1233645463. The reversal of 1233645461 is 1645463321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 644855236 + 588790225 = 25394^2 + 24265^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1233645461 is a prime.

It is a super-2 number, since 2×1233645461² = 3043762246891805042, which contains 22 as substring.

Together with 1233645463, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1233645463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 616822730 + 616822731.

It is an arithmetic number, because the mean of its divisors is an integer number (616822731).

Almost surely, 2^1233645461 is an apocalyptic number.

It is an amenable number.

1233645461 is a deficient number, since it is larger than the sum of its proper divisors (1).

1233645461 is an equidigital number, since it uses as much as digits as its factorization.

1233645461 is an evil number, because the sum of its binary digits is even.

The product of its digits is 51840, while the sum is 35.

The square root of 1233645461 is about 35123.2894387755. The cubic root of 1233645461 is about 1072.4987344472.

The spelling of 1233645461 in words is "one billion, two hundred thirty-three million, six hundred forty-five thousand, four hundred sixty-one".