202074391 has 4 divisors (see below), whose sum is σ = 203412784. Its totient is φ = 200736000.

The previous prime is 202074347. The next prime is 202074401. The reversal of 202074391 is 193470202.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 193470202 = 2 ⋅96735101.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-202074391 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 (202074311) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 668970 + ... + 669271.

It is an arithmetic number, because the mean of its divisors is an integer number (50853196).

Almost surely, 2^202074391 is an apocalyptic number.

202074391 is a deficient number, since it is larger than the sum of its proper divisors (1338393).

202074391 is a wasteful number, since it uses less digits than its factorization.

202074391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1338392.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 202074391 is about 14215.2872288955. The cubic root of 202074391 is about 586.8184494856.

The spelling of 202074391 in words is "two hundred two million, seventy-four thousand, three hundred ninety-one".