1001209487 has 2 divisors, whose sum is σ = 1001209488. Its totient is φ = 1001209486.

The previous prime is 1001209483. The next prime is 1001209499. The reversal of 1001209487 is 7849021001.

It is a weak prime.

It is an emirp because it is prime and its reverse (7849021001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1001209487 - 2² = 1001209483 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1001209483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500604743 + 500604744.

It is an arithmetic number, because the mean of its divisors is an integer number (500604744).

Almost surely, 2^1001209487 is an apocalyptic number.

1001209487 is a deficient number, since it is larger than the sum of its proper divisors (1).

1001209487 is an equidigital number, since it uses as much as digits as its factorization.

1001209487 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 32.

The square root of 1001209487 is about 31641.8944913227. The cubic root of 1001209487 is about 1000.4029999026.

The spelling of 1001209487 in words is "one billion, one million, two hundred nine thousand, four hundred eighty-seven".