6949921251 has 32 divisors (see below), whose sum is σ = 12005271040. Its totient is φ = 3472948224.

The previous prime is 6949921241. The next prime is 6949921313. The reversal of 6949921251 is 1521299496.

It is not a de Polignac number, because 6949921251 - 2⁵ = 6949921219 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6949921251.

It is not an unprimeable number, because it can be changed into a prime (6949921241) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 664750 + ... + 675123.

It is an arithmetic number, because the mean of its divisors is an integer number (375164720).

Almost surely, 2^6949921251 is an apocalyptic number.

6949921251 is a deficient number, since it is larger than the sum of its proper divisors (5055349789).

6949921251 is a wasteful number, since it uses less digits than its factorization.

6949921251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1339915.

The product of its digits is 349920, while the sum is 48.

The square root of 6949921251 is about 83366.1876962117. The cubic root of 6949921251 is about 1908.3584894065.

The spelling of 6949921251 in words is "six billion, nine hundred forty-nine million, nine hundred twenty-one thousand, two hundred fifty-one".