749505949 has 2 divisors, whose sum is σ = 749505950. Its totient is φ = 749505948.

The previous prime is 749505947. The next prime is 749505959. The reversal of 749505949 is 949505947.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 439112025 + 310393924 = 20955^2 + 17618^2 .

It is a cyclic number.

It is not a de Polignac number, because 749505949 - 2¹ = 749505947 is a prime.

Together with 749505947, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 749505896 and 749505905.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (749505947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 374752974 + 374752975.

It is an arithmetic number, because the mean of its divisors is an integer number (374752975).

Almost surely, 2^749505949 is an apocalyptic number.

It is an amenable number.

749505949 is a deficient number, since it is larger than the sum of its proper divisors (1).

749505949 is an equidigital number, since it uses as much as digits as its factorization.

749505949 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2041200, while the sum is 52.

The square root of 749505949 is about 27377.1062933978. The cubic root of 749505949 is about 908.3607525395.

The spelling of 749505949 in words is "seven hundred forty-nine million, five hundred five thousand, nine hundred forty-nine".