1287150913 has 2 divisors, whose sum is σ = 1287150914. Its totient is φ = 1287150912.

The previous prime is 1287150889. The next prime is 1287150929. The reversal of 1287150913 is 3190517821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1286872129 + 278784 = 35873^2 + 528^2 .

It is a cyclic number.

It is not a de Polignac number, because 1287150913 - 2⁵ = 1287150881 is a prime.

It is not a weakly prime, because it can be changed into another prime (1287150983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 643575456 + 643575457.

It is an arithmetic number, because the mean of its divisors is an integer number (643575457).

Almost surely, 2^1287150913 is an apocalyptic number.

It is an amenable number.

1287150913 is a deficient number, since it is larger than the sum of its proper divisors (1).

1287150913 is an equidigital number, since it uses as much as digits as its factorization.

1287150913 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15120, while the sum is 37.

The square root of 1287150913 is about 35876.8854974899. The cubic root of 1287150913 is about 1087.7852267747.

The spelling of 1287150913 in words is "one billion, two hundred eighty-seven million, one hundred fifty thousand, nine hundred thirteen".