1647992145 has 8 divisors (see below), whose sum is σ = 2636787456. Its totient is φ = 878929136.

The previous prime is 1647992119. The next prime is 1647992153. The reversal of 1647992145 is 5412997461.

It is a happy number.

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 1647992145 - 2⁸ = 1647991889 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1647992094 and 1647992103.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54933057 + ... + 54933086.

It is an arithmetic number, because the mean of its divisors is an integer number (329598432).

Almost surely, 2^1647992145 is an apocalyptic number.

1647992145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1647992145 is a deficient number, since it is larger than the sum of its proper divisors (988795311).

1647992145 is a wasteful number, since it uses less digits than its factorization.

1647992145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109866151.

The product of its digits is 544320, while the sum is 48.

The square root of 1647992145 is about 40595.4695132351. The cubic root of 1647992145 is about 1181.1862400567.

The spelling of 1647992145 in words is "one billion, six hundred forty-seven million, nine hundred ninety-two thousand, one hundred forty-five".