201989942 has 16 divisors (see below), whose sum is σ = 377747712. Its totient is φ = 78697320.

The previous prime is 201989929. The next prime is 201990011. The reversal of 201989942 is 249989102.

It is a junction number, because it is equal to n+sod(n) for n = 201989893 and 201989902.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 655658 + ... + 655965.

It is an arithmetic number, because the mean of its divisors is an integer number (23609232).

Almost surely, 2^201989942 is an apocalyptic number.

201989942 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

201989942 is a deficient number, since it is larger than the sum of its proper divisors (175757770).

201989942 is a wasteful number, since it uses less digits than its factorization.

201989942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1311643.

The product of its (nonzero) digits is 93312, while the sum is 44.

The square root of 201989942 is about 14212.3165599419. The cubic root of 201989942 is about 586.7366922410.

The spelling of 201989942 in words is "two hundred one million, nine hundred eighty-nine thousand, nine hundred forty-two".