749211279889 has 2 divisors, whose sum is σ = 749211279890. Its totient is φ = 749211279888.

The previous prime is 749211279853. The next prime is 749211279911. The reversal of 749211279889 is 988972112947.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 715944438225 + 33266841664 = 846135^2 + 182392^2 .

It is a cyclic number.

It is not a de Polignac number, because 749211279889 - 2¹⁵ = 749211247121 is a prime.

It is a super-2 number, since 2×749211279889² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (749211279589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 374605639944 + 374605639945.

It is an arithmetic number, because the mean of its divisors is an integer number (374605639945).

Almost surely, 2^749211279889 is an apocalyptic number.

It is an amenable number.

749211279889 is a deficient number, since it is larger than the sum of its proper divisors (1).

749211279889 is an equidigital number, since it uses as much as digits as its factorization.

749211279889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36578304, while the sum is 67.

The spelling of 749211279889 in words is "seven hundred forty-nine billion, two hundred eleven million, two hundred seventy-nine thousand, eight hundred eighty-nine".