987571457 has 2 divisors, whose sum is σ = 987571458. Its totient is φ = 987571456.

The previous prime is 987571451. The next prime is 987571513. The reversal of 987571457 is 754175789.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 918332416 + 69239041 = 30304^2 + 8321^2 .

It is an emirp because it is prime and its reverse (754175789) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 987571457 - 2²⁰ = 986522881 is a prime.

It is a super-2 number, since 2×987571457² = 1950594765362205698, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 987571399 and 987571408.

It is not a weakly prime, because it can be changed into another prime (987571451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 493785728 + 493785729.

It is an arithmetic number, because the mean of its divisors is an integer number (493785729).

Almost surely, 2^987571457 is an apocalyptic number.

It is an amenable number.

987571457 is a deficient number, since it is larger than the sum of its proper divisors (1).

987571457 is an equidigital number, since it uses as much as digits as its factorization.

987571457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2469600, while the sum is 53.

The square root of 987571457 is about 31425.6496671111. The cubic root of 987571457 is about 995.8398696481.

The spelling of 987571457 in words is "nine hundred eighty-seven million, five hundred seventy-one thousand, four hundred fifty-seven".