6929481257 has 2 divisors, whose sum is σ = 6929481258. Its totient is φ = 6929481256.

The previous prime is 6929481227. The next prime is 6929481269. The reversal of 6929481257 is 7521849296.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5615853721 + 1313627536 = 74939^2 + 36244^2 .

It is a cyclic number.

It is not a de Polignac number, because 6929481257 - 2⁸ = 6929481001 is a prime.

It is a super-2 number, since 2×6929481257² = 96035420982228600098, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6929481199 and 6929481208.

It is not a weakly prime, because it can be changed into another prime (6929481227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3464740628 + 3464740629.

It is an arithmetic number, because the mean of its divisors is an integer number (3464740629).

Almost surely, 2^6929481257 is an apocalyptic number.

It is an amenable number.

6929481257 is a deficient number, since it is larger than the sum of its proper divisors (1).

6929481257 is an equidigital number, since it uses as much as digits as its factorization.

6929481257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2177280, while the sum is 53.

The square root of 6929481257 is about 83243.5057947465. The cubic root of 6929481257 is about 1906.4857996553.

The spelling of 6929481257 in words is "six billion, nine hundred twenty-nine million, four hundred eighty-one thousand, two hundred fifty-seven".