346640653 has 4 divisors (see below), whose sum is σ = 346769500. Its totient is φ = 346511808.

The previous prime is 346640641. The next prime is 346640699. The reversal of 346640653 is 356046643.

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

It can be written as a sum of positive squares in 2 ways, for example, as 81667369 + 264973284 = 9037^2 + 16278^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-346640653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (346640953) 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, 60300 + ... + 65797.

It is an arithmetic number, because the mean of its divisors is an integer number (86692375).

Almost surely, 2^346640653 is an apocalyptic number.

It is an amenable number.

346640653 is a deficient number, since it is larger than the sum of its proper divisors (128847).

346640653 is a wasteful number, since it uses less digits than its factorization.

346640653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128846.

The product of its (nonzero) digits is 155520, while the sum is 37.

The square root of 346640653 is about 18618.2881329085. The cubic root of 346640653 is about 702.4679235448.

The spelling of 346640653 in words is "three hundred forty-six million, six hundred forty thousand, six hundred fifty-three".