1329797623 has 36 divisors (see below), whose sum is σ = 1714157200. Its totient is φ = 1030417080.

The previous prime is 1329797551. The next prime is 1329797627. The reversal of 1329797623 is 3267979231.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It is not a de Polignac number, because 1329797623 - 2¹⁷ = 1329666551 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1329797627) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 7428948 + ... + 7429126.

Almost surely, 2^1329797623 is an apocalyptic number.

1329797623 is a deficient number, since it is larger than the sum of its proper divisors (384359577).

1329797623 is an frugal number, since it uses more digits than its factorization.

1329797623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 401 (or 197 counting only the distinct ones).

The product of its digits is 857304, while the sum is 49.

The square root of 1329797623 is about 36466.3903204033. The cubic root of 1329797623 is about 1099.6686668752.

The spelling of 1329797623 in words is "one billion, three hundred twenty-nine million, seven hundred ninety-seven thousand, six hundred twenty-three".