1554103987 has 2 divisors, whose sum is σ = 1554103988. Its totient is φ = 1554103986.

The previous prime is 1554103981. The next prime is 1554104003. The reversal of 1554103987 is 7893014551.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1554103987 - 2¹⁵ = 1554071219 is a prime.

It is not a weakly prime, because it can be changed into another prime (1554103981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 777051993 + 777051994.

It is an arithmetic number, because the mean of its divisors is an integer number (777051994).

Almost surely, 2^1554103987 is an apocalyptic number.

1554103987 is a deficient number, since it is larger than the sum of its proper divisors (1).

1554103987 is an equidigital number, since it uses as much as digits as its factorization.

1554103987 is an evil number, because the sum of its binary digits is even.

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

The square root of 1554103987 is about 39422.1256022554. The cubic root of 1554103987 is about 1158.3150296345.

The spelling of 1554103987 in words is "one billion, five hundred fifty-four million, one hundred three thousand, nine hundred eighty-seven".