742438999217 has 2 divisors, whose sum is σ = 742438999218. Its totient is φ = 742438999216.

The previous prime is 742438999199. The next prime is 742438999243. The reversal of 742438999217 is 712999834247.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 742438999201 + 16 = 861649^2 + 4^2 .

It is a cyclic number.

It is not a de Polignac number, because 742438999217 - 2²² = 742434804913 is a prime.

It is a super-2 number, since 2×742438999217² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (742438999717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 371219499608 + 371219499609.

It is an arithmetic number, because the mean of its divisors is an integer number (371219499609).

Almost surely, 2^742438999217 is an apocalyptic number.

It is an amenable number.

742438999217 is a deficient number, since it is larger than the sum of its proper divisors (1).

742438999217 is an equidigital number, since it uses as much as digits as its factorization.

742438999217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54867456, while the sum is 65.

The spelling of 742438999217 in words is "seven hundred forty-two billion, four hundred thirty-eight million, nine hundred ninety-nine thousand, two hundred seventeen".