275404981 has 32 divisors (see below), whose sum is σ = 319334400. Its totient is φ = 235872000.

The previous prime is 275404973. The next prime is 275404993. The reversal of 275404981 is 189404572.

It is a cyclic number.

It is not a de Polignac number, because 275404981 - 2³ = 275404973 is a prime.

It is a super-2 number, since 2×275404981² = 151695807119220722, 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 (275404681) 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 31 ways as a sum of consecutive naturals, for example, 1097106 + ... + 1097356.

It is an arithmetic number, because the mean of its divisors is an integer number (9979200).

Almost surely, 2^275404981 is an apocalyptic number.

It is an amenable number.

275404981 is a deficient number, since it is larger than the sum of its proper divisors (43929419).

275404981 is a wasteful number, since it uses less digits than its factorization.

275404981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 409.

The product of its (nonzero) digits is 80640, while the sum is 40.

The square root of 275404981 is about 16595.3300961445. The cubic root of 275404981 is about 650.6147879585.

The spelling of 275404981 in words is "two hundred seventy-five million, four hundred four thousand, nine hundred eighty-one".