1005657487 has 2 divisors, whose sum is σ = 1005657488. Its totient is φ = 1005657486.

The previous prime is 1005657463. The next prime is 1005657493. The reversal of 1005657487 is 7847565001.

It is a strong prime.

It is an emirp because it is prime and its reverse (7847565001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1005657487 - 2²³ = 997268879 is a prime.

It is a super-2 number, since 2×1005657487² = 2022693962318310338, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1005657427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 502828743 + 502828744.

It is an arithmetic number, because the mean of its divisors is an integer number (502828744).

Almost surely, 2^1005657487 is an apocalyptic number.

1005657487 is a deficient number, since it is larger than the sum of its proper divisors (1).

1005657487 is an equidigital number, since it uses as much as digits as its factorization.

1005657487 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 235200, while the sum is 43.

The square root of 1005657487 is about 31712.1031626728. The cubic root of 1005657487 is about 1001.8822837848.

The spelling of 1005657487 in words is "one billion, five million, six hundred fifty-seven thousand, four hundred eighty-seven".