6929921077 has 2 divisors, whose sum is σ = 6929921078. Its totient is φ = 6929921076.

The previous prime is 6929921069. The next prime is 6929921177. The reversal of 6929921077 is 7701299296.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6496198801 + 433722276 = 80599^2 + 20826^2 .

It is a cyclic number.

It is not a de Polignac number, because 6929921077 - 2³ = 6929921069 is a prime.

It is a super-2 number, since 2×6929921077² = 96047612266897679858, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6929921057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3464960538 + 3464960539.

It is an arithmetic number, because the mean of its divisors is an integer number (3464960539).

Almost surely, 2^6929921077 is an apocalyptic number.

It is an amenable number.

6929921077 is a deficient number, since it is larger than the sum of its proper divisors (1).

6929921077 is an equidigital number, since it uses as much as digits as its factorization.

6929921077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 857304, while the sum is 52.

The square root of 6929921077 is about 83246.1475204709. The cubic root of 6929921077 is about 1906.5261342207.

The spelling of 6929921077 in words is "six billion, nine hundred twenty-nine million, nine hundred twenty-one thousand, seventy-seven".