9921392629 has 8 divisors (see below), whose sum is σ = 10076858528. Its totient is φ = 9766144080.

The previous prime is 9921392597. The next prime is 9921392653. The reversal of 9921392629 is 9262931299.

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

It is a cyclic number.

It is not a de Polignac number, because 9921392629 - 2⁵ = 9921392597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9921392699) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38914 + ... + 146140.

It is an arithmetic number, because the mean of its divisors is an integer number (1259607316).

Almost surely, 2^9921392629 is an apocalyptic number.

It is an amenable number.

9921392629 is a deficient number, since it is larger than the sum of its proper divisors (155465899).

9921392629 is a wasteful number, since it uses less digits than its factorization.

9921392629 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108675.

The product of its digits is 944784, while the sum is 52.

The square root of 9921392629 is about 99606.1877043791. The cubic root of 9921392629 is about 2148.7746851872.

The spelling of 9921392629 in words is "nine billion, nine hundred twenty-one million, three hundred ninety-two thousand, six hundred twenty-nine".