1535697901 has 2 divisors, whose sum is σ = 1535697902. Its totient is φ = 1535697900.

The previous prime is 1535697899. The next prime is 1535697953. The reversal of 1535697901 is 1097965351.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1003242276 + 532455625 = 31674^2 + 23075^2 .

It is a cyclic number.

It is not a de Polignac number, because 1535697901 - 2¹ = 1535697899 is a prime.

Together with 1535697899, 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 (1535692901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 767848950 + 767848951.

It is an arithmetic number, because the mean of its divisors is an integer number (767848951).

Almost surely, 2^1535697901 is an apocalyptic number.

It is an amenable number.

1535697901 is a deficient number, since it is larger than the sum of its proper divisors (1).

1535697901 is an equidigital number, since it uses as much as digits as its factorization.

1535697901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 255150, while the sum is 46.

The square root of 1535697901 is about 39187.9815887473. The cubic root of 1535697901 is about 1153.7240085514.

The spelling of 1535697901 in words is "one billion, five hundred thirty-five million, six hundred ninety-seven thousand, nine hundred one".