261479674 has 4 divisors (see below), whose sum is σ = 392219514. Its totient is φ = 130739836.

The previous prime is 261479671. The next prime is 261479677. The reversal of 261479674 is 476974162.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (261479671) and next prime (261479677).

It can be written as a sum of positive squares in only one way, i.e., 132089049 + 129390625 = 11493^2 + 11375^2 .

It is a super-3 number, since 3×261479674³ (a number of 26 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (261479671) 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 as a sum of consecutive naturals, namely, 65369917 + ... + 65369920.

Almost surely, 2^261479674 is an apocalyptic number.

261479674 is a deficient number, since it is larger than the sum of its proper divisors (130739840).

261479674 is a wasteful number, since it uses less digits than its factorization.

261479674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130739839.

The product of its digits is 508032, while the sum is 46.

The square root of 261479674 is about 16170.3331443728. Note that the first 3 decimals coincide. The cubic root of 261479674 is about 639.4589127846.

The spelling of 261479674 in words is "two hundred sixty-one million, four hundred seventy-nine thousand, six hundred seventy-four".