7893929381 has 8 divisors (see below), whose sum is σ = 8506460760. Its totient is φ = 7282156032.

The previous prime is 7893929377. The next prime is 7893929423. The reversal of 7893929381 is 1839293987.

It can be written as a sum of positive squares in 4 ways, for example, as 362293156 + 7531636225 = 19034^2 + 86785^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7893929381 - 2² = 7893929377 is a prime.

It is a super-2 number, since 2×7893929381² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7893929381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7893929081) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 167780 + ... + 209613.

It is an arithmetic number, because the mean of its divisors is an integer number (1063307595).

Almost surely, 2^7893929381 is an apocalyptic number.

It is an amenable number.

7893929381 is a deficient number, since it is larger than the sum of its proper divisors (612531379).

7893929381 is a wasteful number, since it uses less digits than its factorization.

7893929381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 379015.

The product of its digits is 5878656, while the sum is 59.

The square root of 7893929381 is about 88847.7877102182. The cubic root of 7893929381 is about 1991.1214255319.

The spelling of 7893929381 in words is "seven billion, eight hundred ninety-three million, nine hundred twenty-nine thousand, three hundred eighty-one".