490035981 has 4 divisors (see below), whose sum is σ = 653381312. Its totient is φ = 326690652.

The previous prime is 490035943. The next prime is 490035989. The reversal of 490035981 is 189530094.

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.

It is not a de Polignac number, because 490035981 - 2¹⁰ = 490034957 is a prime.

It is a super-2 number, since 2×490035981² = 480270525349264722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (490035989) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81672661 + ... + 81672666.

It is an arithmetic number, because the mean of its divisors is an integer number (163345328).

Almost surely, 2^490035981 is an apocalyptic number.

It is an amenable number.

490035981 is a deficient number, since it is larger than the sum of its proper divisors (163345331).

490035981 is a wasteful number, since it uses less digits than its factorization.

490035981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163345330.

The product of its (nonzero) digits is 38880, while the sum is 39.

The square root of 490035981 is about 22136.7563342058. The cubic root of 490035981 is about 788.3928127549.

The spelling of 490035981 in words is "four hundred ninety million, thirty-five thousand, nine hundred eighty-one".