748409569 has 2 divisors, whose sum is σ = 748409570. Its totient is φ = 748409568.

The previous prime is 748409551. The next prime is 748409573. The reversal of 748409569 is 965904847.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 404492544 + 343917025 = 20112^2 + 18545^2 .

It is an emirp because it is prime and its reverse (965904847) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 748409569 - 2⁵ = 748409537 is a prime.

It is a super-2 number, since 2×748409569² = 1120233765941531522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (748409869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 374204784 + 374204785.

It is an arithmetic number, because the mean of its divisors is an integer number (374204785).

Almost surely, 2^748409569 is an apocalyptic number.

It is an amenable number.

748409569 is a deficient number, since it is larger than the sum of its proper divisors (1).

748409569 is an equidigital number, since it uses as much as digits as its factorization.

748409569 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2177280, while the sum is 52.

The square root of 748409569 is about 27357.0753005507. The cubic root of 748409569 is about 907.9176186038.

The spelling of 748409569 in words is "seven hundred forty-eight million, four hundred nine thousand, five hundred sixty-nine".