342621661 has 4 divisors (see below), whose sum is σ = 360654400. Its totient is φ = 324588924.

The previous prime is 342621659. The next prime is 342621667. The reversal of 342621661 is 166126243.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 342621661 - 2¹ = 342621659 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 (342621667) 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, 9016341 + ... + 9016378.

It is an arithmetic number, because the mean of its divisors is an integer number (90163600).

Almost surely, 2^342621661 is an apocalyptic number.

It is an amenable number.

342621661 is a deficient number, since it is larger than the sum of its proper divisors (18032739).

342621661 is a wasteful number, since it uses less digits than its factorization.

342621661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18032738.

The product of its digits is 10368, while the sum is 31.

The square root of 342621661 is about 18510.0421663485. The cubic root of 342621661 is about 699.7425318424.

The spelling of 342621661 in words is "three hundred forty-two million, six hundred twenty-one thousand, six hundred sixty-one".