1538732057 has 2 divisors, whose sum is σ = 1538732058. Its totient is φ = 1538732056.

The previous prime is 1538732053. The next prime is 1538732087. The reversal of 1538732057 is 7502378351.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1327582096 + 211149961 = 36436^2 + 14531^2 .

It is a cyclic number.

It is not a de Polignac number, because 1538732057 - 2² = 1538732053 is a prime.

It is not a weakly prime, because it can be changed into another prime (1538732053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 769366028 + 769366029.

It is an arithmetic number, because the mean of its divisors is an integer number (769366029).

Almost surely, 2^1538732057 is an apocalyptic number.

It is an amenable number.

1538732057 is a deficient number, since it is larger than the sum of its proper divisors (1).

1538732057 is an equidigital number, since it uses as much as digits as its factorization.

1538732057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 176400, while the sum is 41.

The square root of 1538732057 is about 39226.6753243249. The cubic root of 1538732057 is about 1154.4833323143.

The spelling of 1538732057 in words is "one billion, five hundred thirty-eight million, seven hundred thirty-two thousand, fifty-seven".