1616649 has 8 divisors (see below), whose sum is σ = 2282400. Its totient is φ = 1014336.

The previous prime is 1616639. The next prime is 1616651. The reversal of 1616649 is 9466161.

1616649 = T₆₂ + T₆₃ + ... + T₂₁₄.

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

It is not a de Polignac number, because 1616649 - 2⁴ = 1616633 is a prime.

It is a super-2 number, since 2×1616649² = 5227107978402, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1616609) 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, 15799 + ... + 15900.

It is an arithmetic number, because the mean of its divisors is an integer number (285300).

2^1616649 is an apocalyptic number.

It is an amenable number.

1616649 is a deficient number, since it is larger than the sum of its proper divisors (665751).

1616649 is a wasteful number, since it uses less digits than its factorization.

1616649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31719.

The product of its digits is 7776, while the sum is 33.

The square root of 1616649 is about 1271.4751275585. The cubic root of 1616649 is about 117.3649935726.

The spelling of 1616649 in words is "one million, six hundred sixteen thousand, six hundred forty-nine".