1500409969 has 2 divisors, whose sum is σ = 1500409970. Its totient is φ = 1500409968.

The previous prime is 1500409957. The next prime is 1500409973. The reversal of 1500409969 is 9699040051.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1493049600 + 7360369 = 38640^2 + 2713^2 .

It is a cyclic number.

It is not a de Polignac number, because 1500409969 - 2¹⁵ = 1500377201 is a prime.

It is a super-3 number, since 3×1500409969³ (a number of 29 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (1500409769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 750204984 + 750204985.

It is an arithmetic number, because the mean of its divisors is an integer number (750204985).

Almost surely, 2^1500409969 is an apocalyptic number.

It is an amenable number.

1500409969 is a deficient number, since it is larger than the sum of its proper divisors (1).

1500409969 is an equidigital number, since it uses as much as digits as its factorization.

1500409969 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 87480, while the sum is 43.

The square root of 1500409969 is about 38735.1257775162. The cubic root of 1500409969 is about 1144.8185213544.

The spelling of 1500409969 in words is "one billion, five hundred million, four hundred nine thousand, nine hundred sixty-nine".