1534743989 has 2 divisors, whose sum is σ = 1534743990. Its totient is φ = 1534743988.

The previous prime is 1534743967. The next prime is 1534744033. The reversal of 1534743989 is 9893474351.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1479017764 + 55726225 = 38458^2 + 7465^2 .

It is a cyclic number.

It is not a de Polignac number, because 1534743989 - 2²⁰ = 1533695413 is a prime.

It is a super-2 number, since 2×1534743989² = 4710878223543264242, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1534743989.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1534743929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 767371994 + 767371995.

It is an arithmetic number, because the mean of its divisors is an integer number (767371995).

Almost surely, 2^1534743989 is an apocalyptic number.

It is an amenable number.

1534743989 is a deficient number, since it is larger than the sum of its proper divisors (1).

1534743989 is an equidigital number, since it uses as much as digits as its factorization.

1534743989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3265920, while the sum is 53.

The square root of 1534743989 is about 39175.8087217099. The cubic root of 1534743989 is about 1153.4850771994.

The spelling of 1534743989 in words is "one billion, five hundred thirty-four million, seven hundred forty-three thousand, nine hundred eighty-nine".