7839346649 has 2 divisors, whose sum is σ = 7839346650. Its totient is φ = 7839346648.

The previous prime is 7839346633. The next prime is 7839346673. The reversal of 7839346649 is 9466439387.

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., 6410884624 + 1428462025 = 80068^2 + 37795^2 .

It is a cyclic number.

It is not a de Polignac number, because 7839346649 - 2⁴ = 7839346633 is a prime.

It is a super-2 number, since 2×7839346649² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (7839306649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3919673324 + 3919673325.

It is an arithmetic number, because the mean of its divisors is an integer number (3919673325).

Almost surely, 2^7839346649 is an apocalyptic number.

It is an amenable number.

7839346649 is a deficient number, since it is larger than the sum of its proper divisors (1).

7839346649 is an equidigital number, since it uses as much as digits as its factorization.

7839346649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23514624, while the sum is 59.

The square root of 7839346649 is about 88540.0849841472. The cubic root of 7839346649 is about 1986.5215910451.

The spelling of 7839346649 in words is "seven billion, eight hundred thirty-nine million, three hundred forty-six thousand, six hundred forty-nine".