1087657 has 2 divisors, whose sum is σ = 1087658. Its totient is φ = 1087656.

The previous prime is 1087631. The next prime is 1087663. The reversal of 1087657 is 7567801.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1022121 + 65536 = 1011^2 + 256^2 .

It is an emirp because it is prime and its reverse (7567801) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1087657 is a prime.

1087657 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (1087687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 543828 + 543829.

It is an arithmetic number, because the mean of its divisors is an integer number (543829).

2^1087657 is an apocalyptic number.

It is an amenable number.

1087657 is a deficient number, since it is larger than the sum of its proper divisors (1).

1087657 is an equidigital number, since it uses as much as digits as its factorization.

1087657 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11760, while the sum is 34.

The square root of 1087657 is about 1042.9079537524. The cubic root of 1087657 is about 102.8404542846.

The spelling of 1087657 in words is "one million, eighty-seven thousand, six hundred fifty-seven".