1617000449 has 4 divisors (see below), whose sum is σ = 1629732864. Its totient is φ = 1604268036.

The previous prime is 1617000431. The next prime is 1617000481. The reversal of 1617000449 is 9440007161.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9440007161 = 13 ⋅726154397.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1617000449 is a prime.

It is a super-2 number, since 2×1617000449² = 5229380904132403202, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1617000419) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6366017 + ... + 6366270.

It is an arithmetic number, because the mean of its divisors is an integer number (407433216).

Almost surely, 2^1617000449 is an apocalyptic number.

It is an amenable number.

1617000449 is a deficient number, since it is larger than the sum of its proper divisors (12732415).

1617000449 is a wasteful number, since it uses less digits than its factorization.

1617000449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12732414.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 1617000449 is about 40211.9441086849. The cubic root of 1617000449 is about 1173.7349775237.

The spelling of 1617000449 in words is "one billion, six hundred seventeen million, four hundred forty-nine", and thus it is an aban number.