201942913 has 4 divisors (see below), whose sum is σ = 203152320. Its totient is φ = 200733508.

The previous prime is 201942907. The next prime is 201942941. The reversal of 201942913 is 319249102.

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, and also an emirpimes, since its reverse is a distinct semiprime: 319249102 = 2 ⋅159624551.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201942913 is a prime.

It is a super-2 number, since 2×201942913² = 81561880221851138, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201942943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 604453 + ... + 604786.

It is an arithmetic number, because the mean of its divisors is an integer number (50788080).

Almost surely, 2^201942913 is an apocalyptic number.

It is an amenable number.

201942913 is a deficient number, since it is larger than the sum of its proper divisors (1209407).

201942913 is a wasteful number, since it uses less digits than its factorization.

201942913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1209406.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 201942913 is about 14210.6619479882. The cubic root of 201942913 is about 586.6911523799.

The spelling of 201942913 in words is "two hundred one million, nine hundred forty-two thousand, nine hundred thirteen".