2001402989 has 2 divisors, whose sum is σ = 2001402990. Its totient is φ = 2001402988.

The previous prime is 2001402947. The next prime is 2001403031. The reversal of 2001402989 is 9892041002.

It is a balanced prime because it is at equal distance from previous prime (2001402947) and next prime (2001403031).

It can be written as a sum of positive squares in only one way, i.e., 1291180489 + 710222500 = 35933^2 + 26650^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2001402989 is a prime.

It is a super-2 number, since 2×2001402989² = 8011227848756268242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2001402929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1000701494 + 1000701495.

It is an arithmetic number, because the mean of its divisors is an integer number (1000701495).

Almost surely, 2^2001402989 is an apocalyptic number.

It is an amenable number.

2001402989 is a deficient number, since it is larger than the sum of its proper divisors (1).

2001402989 is an equidigital number, since it uses as much as digits as its factorization.

2001402989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 2001402989 is about 44737.0426939466. The cubic root of 2001402989 is about 1260.2155902618.

The spelling of 2001402989 in words is "two billion, one million, four hundred two thousand, nine hundred eighty-nine".