1987413401 has 2 divisors, whose sum is σ = 1987413402. Its totient is φ = 1987413400.

The previous prime is 1987413391. The next prime is 1987413403. The reversal of 1987413401 is 1043147891.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1985593600 + 1819801 = 44560^2 + 1349^2 .

It is a cyclic number.

It is not a de Polignac number, because 1987413401 - 2²⁶ = 1920304537 is a prime.

Together with 1987413403, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1987413403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 993706700 + 993706701.

It is an arithmetic number, because the mean of its divisors is an integer number (993706701).

Almost surely, 2^1987413401 is an apocalyptic number.

It is an amenable number.

1987413401 is a deficient number, since it is larger than the sum of its proper divisors (1).

1987413401 is an equidigital number, since it uses as much as digits as its factorization.

1987413401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 1987413401 is about 44580.4149935821. The cubic root of 1987413401 is about 1257.2724658180.

The spelling of 1987413401 in words is "one billion, nine hundred eighty-seven million, four hundred thirteen thousand, four hundred one".