1074399661 has 2 divisors, whose sum is σ = 1074399662. Its totient is φ = 1074399660.

The previous prime is 1074399659. The next prime is 1074399671. The reversal of 1074399661 is 1669934701.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 925315561 + 149084100 = 30419^2 + 12210^2 .

It is a cyclic number.

It is not a de Polignac number, because 1074399661 - 2¹ = 1074399659 is a prime.

Together with 1074399659, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1074399671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 537199830 + 537199831.

It is an arithmetic number, because the mean of its divisors is an integer number (537199831).

Almost surely, 2^1074399661 is an apocalyptic number.

It is an amenable number.

1074399661 is a deficient number, since it is larger than the sum of its proper divisors (1).

1074399661 is an equidigital number, since it uses as much as digits as its factorization.

1074399661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 244944, while the sum is 46.

The square root of 1074399661 is about 32778.0362590562. The cubic root of 1074399661 is about 1024.2090780584.

The spelling of 1074399661 in words is "one billion, seventy-four million, three hundred ninety-nine thousand, six hundred sixty-one".