743932465921 has 2 divisors, whose sum is σ = 743932465922. Its totient is φ = 743932465920.

The previous prime is 743932465897. The next prime is 743932465949. The reversal of 743932465921 is 129564239347.

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., 439123576896 + 304808889025 = 662664^2 + 552095^2 .

It is a cyclic number.

It is not a de Polignac number, because 743932465921 - 2¹³ = 743932457729 is a prime.

It is not a weakly prime, because it can be changed into another prime (743932465951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 371966232960 + 371966232961.

It is an arithmetic number, because the mean of its divisors is an integer number (371966232961).

Almost surely, 2^743932465921 is an apocalyptic number.

It is an amenable number.

743932465921 is a deficient number, since it is larger than the sum of its proper divisors (1).

743932465921 is an equidigital number, since it uses as much as digits as its factorization.

743932465921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9797760, while the sum is 55.

The spelling of 743932465921 in words is "seven hundred forty-three billion, nine hundred thirty-two million, four hundred sixty-five thousand, nine hundred twenty-one".