1087631 has 2 divisors, whose sum is σ = 1087632. Its totient is φ = 1087630.

The previous prime is 1087621. The next prime is 1087657. The reversal of 1087631 is 1367801.

It is an a-pointer prime, because the next prime (1087657) can be obtained adding 1087631 to its sum of digits (26).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1087631 - 2¹⁰ = 1086607 is a prime.

It is a super-2 number, since 2×1087631² = 2365882384322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1087631.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1087621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 543815 + 543816.

It is an arithmetic number, because the mean of its divisors is an integer number (543816).

2^1087631 is an apocalyptic number.

1087631 is a deficient number, since it is larger than the sum of its proper divisors (1).

1087631 is an equidigital number, since it uses as much as digits as its factorization.

1087631 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 26.

The square root of 1087631 is about 1042.8954885318. The cubic root of 1087631 is about 102.8396348250.

The spelling of 1087631 in words is "one million, eighty-seven thousand, six hundred thirty-one".