1987554103 has 2 divisors, whose sum is σ = 1987554104. Its totient is φ = 1987554102.

The previous prime is 1987554077. The next prime is 1987554157. The reversal of 1987554103 is 3014557891.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1987554103 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1987554103.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1987554403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 993777051 + 993777052.

It is an arithmetic number, because the mean of its divisors is an integer number (993777052).

Almost surely, 2^1987554103 is an apocalyptic number.

1987554103 is a deficient number, since it is larger than the sum of its proper divisors (1).

1987554103 is an equidigital number, since it uses as much as digits as its factorization.

1987554103 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 151200, while the sum is 43.

The square root of 1987554103 is about 44581.9930353052. The cubic root of 1987554103 is about 1257.3021352996.

The spelling of 1987554103 in words is "one billion, nine hundred eighty-seven million, five hundred fifty-four thousand, one hundred three".