1978874087 has 2 divisors, whose sum is σ = 1978874088. Its totient is φ = 1978874086.

The previous prime is 1978874083. The next prime is 1978874129. The reversal of 1978874087 is 7804788791.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1978874087 - 2² = 1978874083 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1978874083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 989437043 + 989437044.

It is an arithmetic number, because the mean of its divisors is an integer number (989437044).

Almost surely, 2^1978874087 is an apocalyptic number.

1978874087 is a deficient number, since it is larger than the sum of its proper divisors (1).

1978874087 is an equidigital number, since it uses as much as digits as its factorization.

1978874087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6322176, while the sum is 59.

The square root of 1978874087 is about 44484.5376170192. The cubic root of 1978874087 is about 1255.4691741673.

The spelling of 1978874087 in words is "one billion, nine hundred seventy-eight million, eight hundred seventy-four thousand, eighty-seven".