6921401927 has 16 divisors (see below), whose sum is σ = 7577517600. Its totient is φ = 6269821440.

The previous prime is 6921401911. The next prime is 6921401933. The reversal of 6921401927 is 7291041296.

It is a cyclic number.

It is not a de Polignac number, because 6921401927 - 2⁴ = 6921401911 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 (6921401027) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6308843 + ... + 6309939.

It is an arithmetic number, because the mean of its divisors is an integer number (473594850).

Almost surely, 2^6921401927 is an apocalyptic number.

6921401927 is a deficient number, since it is larger than the sum of its proper divisors (656115673).

6921401927 is a wasteful number, since it uses less digits than its factorization.

6921401927 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2626.

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 6921401927 is about 83194.9633511549. The cubic root of 6921401927 is about 1905.7445648463.

The spelling of 6921401927 in words is "six billion, nine hundred twenty-one million, four hundred one thousand, nine hundred twenty-seven".