1629494689 has 9 divisors (see below), whose sum is σ = 1676261811. Its totient is φ = 1584001080.

The previous prime is 1629494677. The next prime is 1629494707. The reversal of 1629494689 is 9864949261.

The square root of 1629494689 is 40367.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 1458094225 + 171400464 = 38185^2 + 13092^2 .

It is not a de Polignac number, because 1629494689 - 2⁹ = 1629494177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1629494189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1493034 + ... + 1494124.

Almost surely, 2^1629494689 is an apocalyptic number.

1629494689 is the 40367-th square number.

1629494689 is the 20184-th centered octagonal number.

It is an amenable number.

1629494689 is a deficient number, since it is larger than the sum of its proper divisors (46767122).

1629494689 is an frugal number, since it uses more digits than its factorization.

1629494689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2256 (or 1128 counting only the distinct ones).

The product of its digits is 6718464, while the sum is 58.

The cubic root of 1629494689 is about 1176.7502965845.

The spelling of 1629494689 in words is "one billion, six hundred twenty-nine million, four hundred ninety-four thousand, six hundred eighty-nine".