900196381 has 4 divisors (see below), whose sum is σ = 1028795872. Its totient is φ = 771596892.

The previous prime is 900196373. The next prime is 900196397. The reversal of 900196381 is 183691009.

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: 183691009 = 4643 ⋅39563.

It is a cyclic number.

It is not a de Polignac number, because 900196381 - 2³ = 900196373 is a prime.

It is a super-2 number, since 2×900196381² = 1620707048730994322, 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 900196381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (900196981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64299735 + ... + 64299748.

It is an arithmetic number, because the mean of its divisors is an integer number (257198968).

Almost surely, 2^900196381 is an apocalyptic number.

It is an amenable number.

900196381 is a deficient number, since it is larger than the sum of its proper divisors (128599491).

900196381 is a wasteful number, since it uses less digits than its factorization.

900196381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128599490.

The product of its (nonzero) digits is 11664, while the sum is 37.

The square root of 900196381 is about 30003.2728381422. The cubic root of 900196381 is about 965.5596031175.

The spelling of 900196381 in words is "nine hundred million, one hundred ninety-six thousand, three hundred eighty-one".