1520303969 has 2 divisors, whose sum is σ = 1520303970. Its totient is φ = 1520303968.

The previous prime is 1520303959. The next prime is 1520303977. The reversal of 1520303969 is 9693030251.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1422194944 + 98109025 = 37712^2 + 9905^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1520303969 is a prime.

It is a super-2 number, since 2×1520303969² = 4622648316314305922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1520303909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 760151984 + 760151985.

It is an arithmetic number, because the mean of its divisors is an integer number (760151985).

Almost surely, 2^1520303969 is an apocalyptic number.

It is an amenable number.

1520303969 is a deficient number, since it is larger than the sum of its proper divisors (1).

1520303969 is an equidigital number, since it uses as much as digits as its factorization.

1520303969 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 43740, while the sum is 38.

The square root of 1520303969 is about 38991.0755045305. The cubic root of 1520303969 is about 1149.8560548250.

The spelling of 1520303969 in words is "one billion, five hundred twenty million, three hundred three thousand, nine hundred sixty-nine".