196503391 has 16 divisors (see below), whose sum is σ = 245989440. Its totient is φ = 153054720.

The previous prime is 196503379. The next prime is 196503409. The reversal of 196503391 is 193305691.

It is not a de Polignac number, because 196503391 - 2⁹ = 196502879 is a prime.

It is a super-2 number, since 2×196503391² = 77227165348997762, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 196503391.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (196503311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25020 + ... + 31921.

It is an arithmetic number, because the mean of its divisors is an integer number (15374340).

Almost surely, 2^196503391 is an apocalyptic number.

196503391 is a deficient number, since it is larger than the sum of its proper divisors (49486049).

196503391 is a wasteful number, since it uses less digits than its factorization.

196503391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56994.

The product of its (nonzero) digits is 21870, while the sum is 37.

The square root of 196503391 is about 14017.9667213188. The cubic root of 196503391 is about 581.3754425214.

The spelling of 196503391 in words is "one hundred ninety-six million, five hundred three thousand, three hundred ninety-one".