1621929147319 has 4 divisors (see below), whose sum is σ = 1746692927896. Its totient is φ = 1497165366744.

The previous prime is 1621929147313. The next prime is 1621929147341. The reversal of 1621929147319 is 9137419291261.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1621929147319 - 2¹¹ = 1621929145271 is a prime.

It is a super-2 number, since 2×1621929147319² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1621929147319.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1621929147313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62381890269 + ... + 62381890294.

It is an arithmetic number, because the mean of its divisors is an integer number (436673231974).

Almost surely, 2^{1621929147319} is an apocalyptic number.

1621929147319 is a deficient number, since it is larger than the sum of its proper divisors (124763780577).

1621929147319 is a wasteful number, since it uses less digits than its factorization.

1621929147319 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124763780576.

The product of its digits is 1469664, while the sum is 55.

The spelling of 1621929147319 in words is "one trillion, six hundred twenty-one billion, nine hundred twenty-nine million, one hundred forty-seven thousand, three hundred nineteen".