1002138547 has 2 divisors, whose sum is σ = 1002138548. Its totient is φ = 1002138546.

The previous prime is 1002138539. The next prime is 1002138551. The reversal of 1002138547 is 7458312001.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1002138547 - 2³ = 1002138539 is a prime.

It is not a weakly prime, because it can be changed into another prime (1002138847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 501069273 + 501069274.

It is an arithmetic number, because the mean of its divisors is an integer number (501069274).

Almost surely, 2^1002138547 is an apocalyptic number.

1002138547 is a deficient number, since it is larger than the sum of its proper divisors (1).

1002138547 is an equidigital number, since it uses as much as digits as its factorization.

1002138547 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 1002138547 is about 31656.5719401201. The cubic root of 1002138547 is about 1000.7123414492.

The spelling of 1002138547 in words is "one billion, two million, one hundred thirty-eight thousand, five hundred forty-seven".