987965057 has 2 divisors, whose sum is σ = 987965058. Its totient is φ = 987965056.

The previous prime is 987964981. The next prime is 987965093. The reversal of 987965057 is 750569789.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 924220801 + 63744256 = 30401^2 + 7984^2 .

It is an emirp because it is prime and its reverse (750569789) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 987965057 - 2⁸ = 987964801 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 987964993 and 987965011.

It is not a weakly prime, because it can be changed into another prime (987961057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 493982528 + 493982529.

It is an arithmetic number, because the mean of its divisors is an integer number (493982529).

Almost surely, 2^987965057 is an apocalyptic number.

It is an amenable number.

987965057 is a deficient number, since it is larger than the sum of its proper divisors (1).

987965057 is an equidigital number, since it uses as much as digits as its factorization.

987965057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4762800, while the sum is 56.

The square root of 987965057 is about 31431.9114436268. The cubic root of 987965057 is about 995.9721505441.

The spelling of 987965057 in words is "nine hundred eighty-seven million, nine hundred sixty-five thousand, fifty-seven".