1022164987 has 4 divisors (see below), whose sum is σ = 1022418936. Its totient is φ = 1021911040.

The previous prime is 1022164981. The next prime is 1022164993. The reversal of 1022164987 is 7894612201.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (1022164981) and next prime (1022164993).

It is a cyclic number.

It is not a de Polignac number, because 1022164987 - 2¹⁵ = 1022132219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1022164981) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 120838 + ... + 129019.

It is an arithmetic number, because the mean of its divisors is an integer number (255604734).

Almost surely, 2^1022164987 is an apocalyptic number.

1022164987 is a deficient number, since it is larger than the sum of its proper divisors (253949).

1022164987 is an equidigital number, since it uses as much as digits as its factorization.

1022164987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253948.

The product of its (nonzero) digits is 48384, while the sum is 40.

The square root of 1022164987 is about 31971.3150652268. The cubic root of 1022164987 is about 1007.3344040035.

The spelling of 1022164987 in words is "one billion, twenty-two million, one hundred sixty-four thousand, nine hundred eighty-seven".