234401661 has 64 divisors (see below), whose sum is σ = 400055040. Its totient is φ = 134369280.

The previous prime is 234401653. The next prime is 234401681. The reversal of 234401661 is 166104432.

It is not a de Polignac number, because 234401661 - 2³ = 234401653 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (234401641) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 972501 + ... + 972741.

It is an arithmetic number, because the mean of its divisors is an integer number (6250860).

Almost surely, 2^234401661 is an apocalyptic number.

It is an amenable number.

234401661 is a deficient number, since it is larger than the sum of its proper divisors (165653379).

234401661 is a wasteful number, since it uses less digits than its factorization.

234401661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 443 (or 437 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 234401661 is about 15310.1816122475. The cubic root of 234401661 is about 616.5763960714.

The spelling of 234401661 in words is "two hundred thirty-four million, four hundred one thousand, six hundred sixty-one".