987457 has 2 divisors, whose sum is σ = 987458. Its totient is φ = 987456.

The previous prime is 987433. The next prime is 987463. The reversal of 987457 is 754789.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 790321 + 197136 = 889^2 + 444^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-987457 is a prime.

It is not a weakly prime, because it can be changed into another prime (984457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 493728 + 493729.

It is an arithmetic number, because the mean of its divisors is an integer number (493729).

2⁹⁸⁷⁴⁵⁷ is an apocalyptic number.

It is an amenable number.

987457 is a deficient number, since it is larger than the sum of its proper divisors (1).

987457 is an equidigital number, since it uses as much as digits as its factorization.

987457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 70560, while the sum is 40.

The square root of 987457 is about 993.7087098340. The cubic root of 987457 is about 99.5801396399.

It can be divided in two parts, 987 and 457, that added together give a square (1444 = 38²).

The spelling of 987457 in words is "nine hundred eighty-seven thousand, four hundred fifty-seven".