1522999987 has 2 divisors, whose sum is σ = 1522999988. Its totient is φ = 1522999986.

The previous prime is 1522999909. The next prime is 1522999991. The reversal of 1522999987 is 7899992251.

It is a strong prime.

It is an emirp because it is prime and its reverse (7899992251) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1522999987 - 2¹⁹ = 1522475699 is a prime.

It is not a weakly prime, because it can be changed into another prime (1522999187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 761499993 + 761499994.

It is an arithmetic number, because the mean of its divisors is an integer number (761499994).

Almost surely, 2^1522999987 is an apocalyptic number.

1522999987 is a deficient number, since it is larger than the sum of its proper divisors (1).

1522999987 is an equidigital number, since it uses as much as digits as its factorization.

1522999987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7348320, while the sum is 61.

The square root of 1522999987 is about 39025.6324356185. The cubic root of 1522999987 is about 1150.5353492327.

The spelling of 1522999987 in words is "one billion, five hundred twenty-two million, nine hundred ninety-nine thousand, nine hundred eighty-seven".