261669093 has 32 divisors (see below), whose sum is σ = 413736960. Its totient is φ = 143994240.

The previous prime is 261669073. The next prime is 261669101. The reversal of 261669093 is 390966162.

261669093 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 261669093 - 2¹⁶ = 261603557 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261669013) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 66096 + ... + 69942.

It is an arithmetic number, because the mean of its divisors is an integer number (12929280).

Almost surely, 2^261669093 is an apocalyptic number.

It is an amenable number.

261669093 is a deficient number, since it is larger than the sum of its proper divisors (152067867).

261669093 is a wasteful number, since it uses less digits than its factorization.

261669093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3977.

The product of its (nonzero) digits is 104976, while the sum is 42.

The square root of 261669093 is about 16176.1890753045. The cubic root of 261669093 is about 639.6132860729.

The spelling of 261669093 in words is "two hundred sixty-one million, six hundred sixty-nine thousand, ninety-three".