749671381 has 2 divisors, whose sum is σ = 749671382. Its totient is φ = 749671380.

The previous prime is 749671343. The next prime is 749671441. The reversal of 749671381 is 183176947.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 741690756 + 7980625 = 27234^2 + 2825^2 .

It is a cyclic number.

It is not a de Polignac number, because 749671381 - 2⁹ = 749670869 is a prime.

It is a super-2 number, since 2×749671381² = 1124014358980894322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (749671301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 374835690 + 374835691.

It is an arithmetic number, because the mean of its divisors is an integer number (374835691).

Almost surely, 2^749671381 is an apocalyptic number.

It is an amenable number.

749671381 is a deficient number, since it is larger than the sum of its proper divisors (1).

749671381 is an equidigital number, since it uses as much as digits as its factorization.

749671381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 254016, while the sum is 46.

The square root of 749671381 is about 27380.1274832679. The cubic root of 749671381 is about 908.4275791744.

The spelling of 749671381 in words is "seven hundred forty-nine million, six hundred seventy-one thousand, three hundred eighty-one".