1649332429 has 4 divisors (see below), whose sum is σ = 1649856384. Its totient is φ = 1648808476.

The previous prime is 1649332393. The next prime is 1649332441. The reversal of 1649332429 is 9242339461.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1649332429 is a prime.

It is a super-2 number, since 2×1649332429² = 5440594922702080082, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1649332499) 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, 257227 + ... + 263560.

It is an arithmetic number, because the mean of its divisors is an integer number (412464096).

Almost surely, 2^1649332429 is an apocalyptic number.

It is an amenable number.

1649332429 is a deficient number, since it is larger than the sum of its proper divisors (523955).

1649332429 is an equidigital number, since it uses as much as digits as its factorization.

1649332429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 523954.

The product of its digits is 279936, while the sum is 43.

The square root of 1649332429 is about 40611.9739608899. The cubic root of 1649332429 is about 1181.5063661854.

The spelling of 1649332429 in words is "one billion, six hundred forty-nine million, three hundred thirty-two thousand, four hundred twenty-nine".