1930120987 has 2 divisors, whose sum is σ = 1930120988. Its totient is φ = 1930120986.

The previous prime is 1930120963. The next prime is 1930121003. The reversal of 1930120987 is 7890210391.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1930120987 - 2²⁷ = 1795903259 is a prime.

It is not a weakly prime, because it can be changed into another prime (1930120937) 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, 965060493 + 965060494.

It is an arithmetic number, because the mean of its divisors is an integer number (965060494).

Almost surely, 2^1930120987 is an apocalyptic number.

1930120987 is a deficient number, since it is larger than the sum of its proper divisors (1).

1930120987 is an equidigital number, since it uses as much as digits as its factorization.

1930120987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27216, while the sum is 40.

The square root of 1930120987 is about 43933.1422390887. The cubic root of 1930120987 is about 1245.0730831332.

The spelling of 1930120987 in words is "one billion, nine hundred thirty million, one hundred twenty thousand, nine hundred eighty-seven".