1320453769 has 2 divisors, whose sum is σ = 1320453770. Its totient is φ = 1320453768.

The previous prime is 1320453707. The next prime is 1320453809. The reversal of 1320453769 is 9673540231.

It is a happy number.

It is an a-pointer prime, because the next prime (1320453809) can be obtained adding 1320453769 to its sum of digits (40).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1271635600 + 48818169 = 35660^2 + 6987^2 .

It is a cyclic number.

It is not a de Polignac number, because 1320453769 - 2²⁷ = 1186236041 is a prime.

It is a super-2 number, since 2×1320453769² = 3487196312132610722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1320453269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660226884 + 660226885.

It is an arithmetic number, because the mean of its divisors is an integer number (660226885).

Almost surely, 2^1320453769 is an apocalyptic number.

It is an amenable number.

1320453769 is a deficient number, since it is larger than the sum of its proper divisors (1).

1320453769 is an equidigital number, since it uses as much as digits as its factorization.

1320453769 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 136080, while the sum is 40.

The square root of 1320453769 is about 36338.0485029122. The cubic root of 1320453769 is about 1097.0869948324.

The spelling of 1320453769 in words is "one billion, three hundred twenty million, four hundred fifty-three thousand, seven hundred sixty-nine".