1941278987 has 2 divisors, whose sum is σ = 1941278988. Its totient is φ = 1941278986.

The previous prime is 1941278953. The next prime is 1941279013. The reversal of 1941278987 is 7898721491.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1941278987 - 2⁶ = 1941278923 is a prime.

It is not a weakly prime, because it can be changed into another prime (1941278917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 970639493 + 970639494.

It is an arithmetic number, because the mean of its divisors is an integer number (970639494).

Almost surely, 2^1941278987 is an apocalyptic number.

1941278987 is a deficient number, since it is larger than the sum of its proper divisors (1).

1941278987 is an equidigital number, since it uses as much as digits as its factorization.

1941278987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2032128, while the sum is 56.

The square root of 1941278987 is about 44059.9476508995. The cubic root of 1941278987 is about 1247.4677240871.

The spelling of 1941278987 in words is "one billion, nine hundred forty-one million, two hundred seventy-eight thousand, nine hundred eighty-seven".