1597805949 has 8 divisors (see below), whose sum is σ = 2130605440. Its totient is φ = 1065105216.

The previous prime is 1597805933. The next prime is 1597805971. The reversal of 1597805949 is 9495087951.

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

It is not a de Polignac number, because 1597805949 - 2⁴ = 1597805933 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1597805149) 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, 31029 + ... + 64485.

It is an arithmetic number, because the mean of its divisors is an integer number (266325680).

Almost surely, 2^1597805949 is an apocalyptic number.

It is an amenable number.

1597805949 is a deficient number, since it is larger than the sum of its proper divisors (532799491).

1597805949 is a wasteful number, since it uses less digits than its factorization.

1597805949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49379.

The product of its (nonzero) digits is 4082400, while the sum is 57.

The square root of 1597805949 is about 39972.5649539781. The cubic root of 1597805949 is about 1169.0722303902.

The spelling of 1597805949 in words is "one billion, five hundred ninety-seven million, eight hundred five thousand, nine hundred forty-nine".