1145213639 has 2 divisors, whose sum is σ = 1145213640. Its totient is φ = 1145213638.

The previous prime is 1145213579. The next prime is 1145213669. The reversal of 1145213639 is 9363125411.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1145213639 - 2⁸ = 1145213383 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1145213599 and 1145213608.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1145213669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 572606819 + 572606820.

It is an arithmetic number, because the mean of its divisors is an integer number (572606820).

Almost surely, 2^1145213639 is an apocalyptic number.

1145213639 is a deficient number, since it is larger than the sum of its proper divisors (1).

1145213639 is an equidigital number, since it uses as much as digits as its factorization.

1145213639 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 1145213639 is about 33841.0052894414. The cubic root of 1145213639 is about 1046.2340187985.

The spelling of 1145213639 in words is "one billion, one hundred forty-five million, two hundred thirteen thousand, six hundred thirty-nine".