999987487 has 2 divisors, whose sum is σ = 999987488. Its totient is φ = 999987486.

The previous prime is 999987467. The next prime is 999987497. The reversal of 999987487 is 784789999.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 999987487 - 2¹⁵ = 999954719 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999987427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499993743 + 499993744.

It is an arithmetic number, because the mean of its divisors is an integer number (499993744).

Almost surely, 2^999987487 is an apocalyptic number.

999987487 is a deficient number, since it is larger than the sum of its proper divisors (1).

999987487 is an equidigital number, since it uses as much as digits as its factorization.

999987487 is an evil number, because the sum of its binary digits is even.

The product of its digits is 82301184, while the sum is 70.

The square root of 999987487 is about 31622.5787531631. The cubic root of 999987487 is about 999.9958289826.

The spelling of 999987487 in words is "nine hundred ninety-nine million, nine hundred eighty-seven thousand, four hundred eighty-seven".