1597129649 has 8 divisors (see below), whose sum is σ = 1620706560. Its totient is φ = 1573636896.

The previous prime is 1597129631. The next prime is 1597129687. The reversal of 1597129649 is 9469217951.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1597129649 - 2¹⁶ = 1597064113 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1597129649.

It is not an unprimeable number, because it can be changed into a prime (1597120649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17717 + ... + 59229.

It is an arithmetic number, because the mean of its divisors is an integer number (202588320).

Almost surely, 2^1597129649 is an apocalyptic number.

It is an amenable number.

1597129649 is a deficient number, since it is larger than the sum of its proper divisors (23576911).

1597129649 is an equidigital number, since it uses as much as digits as its factorization.

1597129649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42079.

The product of its digits is 1224720, while the sum is 53.

The square root of 1597129649 is about 39964.1045064193. The cubic root of 1597129649 is about 1168.9072635227.

The spelling of 1597129649 in words is "one billion, five hundred ninety-seven million, one hundred twenty-nine thousand, six hundred forty-nine".