1628097749 has 2 divisors, whose sum is σ = 1628097750. Its totient is φ = 1628097748.

The previous prime is 1628097697. The next prime is 1628097767. The reversal of 1628097749 is 9477908261.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1420536100 + 207561649 = 37690^2 + 14407^2 .

It is a cyclic number.

It is not a de Polignac number, because 1628097749 - 2¹² = 1628093653 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1628097749.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1628097049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 814048874 + 814048875.

It is an arithmetic number, because the mean of its divisors is an integer number (814048875).

Almost surely, 2^1628097749 is an apocalyptic number.

It is an amenable number.

1628097749 is a deficient number, since it is larger than the sum of its proper divisors (1).

1628097749 is an equidigital number, since it uses as much as digits as its factorization.

1628097749 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1524096, while the sum is 53.

The square root of 1628097749 is about 40349.6932949930. The cubic root of 1628097749 is about 1176.4139306458.

The spelling of 1628097749 in words is "one billion, six hundred twenty-eight million, ninety-seven thousand, seven hundred forty-nine".