1145213669 has 2 divisors, whose sum is σ = 1145213670. Its totient is φ = 1145213668.

The previous prime is 1145213639. The next prime is 1145213701. The reversal of 1145213669 is 9663125411.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1144468900 + 744769 = 33830^2 + 863^2 .

It is a cyclic number.

It is not a de Polignac number, because 1145213669 - 2⁸ = 1145213413 is a prime.

It is a super-2 number, since 2×1145213669² = 2623028695328883122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1145213639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 572606834 + 572606835.

It is an arithmetic number, because the mean of its divisors is an integer number (572606835).

Almost surely, 2^1145213669 is an apocalyptic number.

It is an amenable number.

1145213669 is a deficient number, since it is larger than the sum of its proper divisors (1).

1145213669 is an equidigital number, since it uses as much as digits as its factorization.

1145213669 is an evil number, because the sum of its binary digits is even.

The product of its digits is 38880, while the sum is 38.

The square root of 1145213669 is about 33841.0057326906. The cubic root of 1145213669 is about 1046.2340279342.

The spelling of 1145213669 in words is "one billion, one hundred forty-five million, two hundred thirteen thousand, six hundred sixty-nine".