6929921149 has 4 divisors (see below), whose sum is σ = 6960449664. Its totient is φ = 6899392636.

The previous prime is 6929921077. The next prime is 6929921177. The reversal of 6929921149 is 9411299296.

It is a happy number.

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-6929921149 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6929921096 and 6929921105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6929921249) 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, 15263917 + ... + 15264370.

It is an arithmetic number, because the mean of its divisors is an integer number (1740112416).

Almost surely, 2^6929921149 is an apocalyptic number.

It is an amenable number.

6929921149 is a deficient number, since it is larger than the sum of its proper divisors (30528515).

6929921149 is a wasteful number, since it uses less digits than its factorization.

6929921149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30528514.

The product of its digits is 629856, while the sum is 52.

The square root of 6929921149 is about 83246.1479529233. The cubic root of 6929921149 is about 1906.5261408235.

The spelling of 6929921149 in words is "six billion, nine hundred twenty-nine million, nine hundred twenty-one thousand, one hundred forty-nine".