1578949087 has 2 divisors, whose sum is σ = 1578949088. Its totient is φ = 1578949086.

The previous prime is 1578949079. The next prime is 1578949093. The reversal of 1578949087 is 7809498751.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1578949087 - 2³ = 1578949079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1578949027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 789474543 + 789474544.

It is an arithmetic number, because the mean of its divisors is an integer number (789474544).

Almost surely, 2^1578949087 is an apocalyptic number.

1578949087 is a deficient number, since it is larger than the sum of its proper divisors (1).

1578949087 is an equidigital number, since it uses as much as digits as its factorization.

1578949087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5080320, while the sum is 58.

The square root of 1578949087 is about 39735.9923369230. The cubic root of 1578949087 is about 1164.4549967881.

The spelling of 1578949087 in words is "one billion, five hundred seventy-eight million, nine hundred forty-nine thousand, eighty-seven".