1023452509 has 2 divisors, whose sum is σ = 1023452510. Its totient is φ = 1023452508.

The previous prime is 1023452501. The next prime is 1023452587. The reversal of 1023452509 is 9052543201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 717972025 + 305480484 = 26795^2 + 17478^2 .

It is a cyclic number.

It is not a de Polignac number, because 1023452509 - 2³ = 1023452501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1023452501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 511726254 + 511726255.

It is an arithmetic number, because the mean of its divisors is an integer number (511726255).

Almost surely, 2^1023452509 is an apocalyptic number.

It is an amenable number.

1023452509 is a deficient number, since it is larger than the sum of its proper divisors (1).

1023452509 is an equidigital number, since it uses as much as digits as its factorization.

1023452509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 1023452509 is about 31991.4443093775. Note that the first 3 decimals coincide. The cubic root of 1023452509 is about 1007.7571736640.

The spelling of 1023452509 in words is "one billion, twenty-three million, four hundred fifty-two thousand, five hundred nine".