1629921434 has 8 divisors (see below), whose sum is σ = 2459881920. Its totient is φ = 809960796.

The previous prime is 1629921431. The next prime is 1629921437. The reversal of 1629921434 is 4341299261.

It is an interprime number because it is at equal distance from previous prime (1629921431) and next prime (1629921437).

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

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1629921391 and 1629921400.

It is not an unprimeable number, because it can be changed into a prime (1629921431) 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, 2499554 + ... + 2500205.

It is an arithmetic number, because the mean of its divisors is an integer number (307485240).

Almost surely, 2^1629921434 is an apocalyptic number.

1629921434 is a deficient number, since it is larger than the sum of its proper divisors (829960486).

1629921434 is a wasteful number, since it uses less digits than its factorization.

1629921434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4999924.

The product of its digits is 93312, while the sum is 41.

The square root of 1629921434 is about 40372.2854691185. The cubic root of 1629921434 is about 1176.8530131869.

The spelling of 1629921434 in words is "one billion, six hundred twenty-nine million, nine hundred twenty-one thousand, four hundred thirty-four".