1533747797 has 2 divisors, whose sum is σ = 1533747798. Its totient is φ = 1533747796.

The previous prime is 1533747781. The next prime is 1533747841. The reversal of 1533747797 is 7977473351.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1287446161 + 246301636 = 35881^2 + 15694^2 .

It is a cyclic number.

It is not a de Polignac number, because 1533747797 - 2⁴ = 1533747781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1533747707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 766873898 + 766873899.

It is an arithmetic number, because the mean of its divisors is an integer number (766873899).

Almost surely, 2^1533747797 is an apocalyptic number.

It is an amenable number.

1533747797 is a deficient number, since it is larger than the sum of its proper divisors (1).

1533747797 is an equidigital number, since it uses as much as digits as its factorization.

1533747797 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3889620, while the sum is 53.

The square root of 1533747797 is about 39163.0922808708. The cubic root of 1533747797 is about 1153.2354500462.

The spelling of 1533747797 in words is "one billion, five hundred thirty-three million, seven hundred forty-seven thousand, seven hundred ninety-seven".