203129890 has 8 divisors (see below), whose sum is σ = 365633820. Its totient is φ = 81251952.

The previous prime is 203129879. The next prime is 203129903. The reversal of 203129890 is 98921302.

It can be written as a sum of positive squares in 2 ways, for example, as 202977009 + 152881 = 14247^2 + 391^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×203129890² = 82523504422824200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10156485 + ... + 10156504.

Almost surely, 2^203129890 is an apocalyptic number.

203129890 is a deficient number, since it is larger than the sum of its proper divisors (162503930).

203129890 is a wasteful number, since it uses less digits than its factorization.

203129890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20312996.

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 203129890 is about 14252.3643652553. The cubic root of 203129890 is about 587.8383890315.

The spelling of 203129890 in words is "two hundred three million, one hundred twenty-nine thousand, eight hundred ninety".