1538009357 has 2 divisors, whose sum is σ = 1538009358. Its totient is φ = 1538009356.

The previous prime is 1538009323. The next prime is 1538009381. The reversal of 1538009357 is 7539008351.

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., 1466200681 + 71808676 = 38291^2 + 8474^2 .

It is a cyclic number.

It is not a de Polignac number, because 1538009357 - 2⁸ = 1538009101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1538009387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 769004678 + 769004679.

It is an arithmetic number, because the mean of its divisors is an integer number (769004679).

Almost surely, 2^1538009357 is an apocalyptic number.

It is an amenable number.

1538009357 is a deficient number, since it is larger than the sum of its proper divisors (1).

1538009357 is an equidigital number, since it uses as much as digits as its factorization.

1538009357 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 113400, while the sum is 41.

The square root of 1538009357 is about 39217.4623987835. The cubic root of 1538009357 is about 1154.3025610190.

The spelling of 1538009357 in words is "one billion, five hundred thirty-eight million, nine thousand, three hundred fifty-seven".