1210022989 has 4 divisors (see below), whose sum is σ = 1382883424. Its totient is φ = 1037162556.

The previous prime is 1210022981. The next prime is 1210022993. The reversal of 1210022989 is 9892200121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1210022989 - 2³ = 1210022981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1210022981) 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, 86430207 + ... + 86430220.

It is an arithmetic number, because the mean of its divisors is an integer number (345720856).

Almost surely, 2^1210022989 is an apocalyptic number.

It is an amenable number.

1210022989 is a deficient number, since it is larger than the sum of its proper divisors (172860435).

1210022989 is an equidigital number, since it uses as much as digits as its factorization.

1210022989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172860434.

The product of its (nonzero) digits is 5184, while the sum is 34.

The square root of 1210022989 is about 34785.3847039241. The cubic root of 1210022989 is about 1065.6089852445.

The spelling of 1210022989 in words is "one billion, two hundred ten million, twenty-two thousand, nine hundred eighty-nine".