735842749921 has 2 divisors, whose sum is σ = 735842749922. Its totient is φ = 735842749920.

The previous prime is 735842749919. The next prime is 735842749997. The reversal of 735842749921 is 129947248537.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 547281846225 + 188560903696 = 739785^2 + 434236^2 .

It is a cyclic number.

It is not a de Polignac number, because 735842749921 - 2¹ = 735842749919 is a prime.

It is a super-2 number, since 2×735842749921² (a number of 25 digits) contains 22 as substring.

Together with 735842749919, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 735842749921.

It is not a weakly prime, because it can be changed into another prime (735842749321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 367921374960 + 367921374961.

It is an arithmetic number, because the mean of its divisors is an integer number (367921374961).

Almost surely, 2^735842749921 is an apocalyptic number.

It is an amenable number.

735842749921 is a deficient number, since it is larger than the sum of its proper divisors (1).

735842749921 is an equidigital number, since it uses as much as digits as its factorization.

735842749921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30481920, while the sum is 61.

The spelling of 735842749921 in words is "seven hundred thirty-five billion, eight hundred forty-two million, seven hundred forty-nine thousand, nine hundred twenty-one".