1629897841 has 16 divisors (see below), whose sum is σ = 1966603968. Its totient is φ = 1330776000.

The previous prime is 1629897827. The next prime is 1629897869. The reversal of 1629897841 is 1487989261.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1629897841 - 2⁹ = 1629897329 is a prime.

It is a super-2 number, since 2×1629897841² = 5313133944192922562, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1629817841) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 148735 + ... + 159316.

It is an arithmetic number, because the mean of its divisors is an integer number (122912748).

Almost surely, 2^1629897841 is an apocalyptic number.

1629897841 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1629897841 is a deficient number, since it is larger than the sum of its proper divisors (336706127).

1629897841 is a wasteful number, since it uses less digits than its factorization.

1629897841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308112.

The product of its digits is 1741824, while the sum is 55.

The square root of 1629897841 is about 40371.9932750415. The cubic root of 1629897841 is about 1176.8473348708.

The spelling of 1629897841 in words is "one billion, six hundred twenty-nine million, eight hundred ninety-seven thousand, eight hundred forty-one".