742686421093 has 2 divisors, whose sum is σ = 742686421094. Its totient is φ = 742686421092.

The previous prime is 742686421049. The next prime is 742686421121. The reversal of 742686421093 is 390124686247.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 634025210049 + 108661211044 = 796257^2 + 329638^2 .

It is an emirp because it is prime and its reverse (390124686247) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 742686421093 - 2²⁵ = 742652866661 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 742686421093.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (742686421493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 371343210546 + 371343210547.

It is an arithmetic number, because the mean of its divisors is an integer number (371343210547).

Almost surely, 2^742686421093 is an apocalyptic number.

It is an amenable number.

742686421093 is a deficient number, since it is larger than the sum of its proper divisors (1).

742686421093 is an equidigital number, since it uses as much as digits as its factorization.

742686421093 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3483648, while the sum is 52.

The spelling of 742686421093 in words is "seven hundred forty-two billion, six hundred eighty-six million, four hundred twenty-one thousand, ninety-three".