321761949 has 4 divisors (see below), whose sum is σ = 429015936. Its totient is φ = 214507964.

The previous prime is 321761893. The next prime is 321761959. The reversal of 321761949 is 949167123.

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, and also an emirpimes, since its reverse is a distinct semiprime: 949167123 = 3 ⋅316389041.

It is a cyclic number.

It is not a de Polignac number, because 321761949 - 2⁹ = 321761437 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 321761949.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321761959) 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, 53626989 + ... + 53626994.

It is an arithmetic number, because the mean of its divisors is an integer number (107253984).

Almost surely, 2^321761949 is an apocalyptic number.

It is an amenable number.

321761949 is a deficient number, since it is larger than the sum of its proper divisors (107253987).

321761949 is a wasteful number, since it uses less digits than its factorization.

321761949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107253986.

The product of its digits is 81648, while the sum is 42.

The square root of 321761949 is about 17937.7241867523. The cubic root of 321761949 is about 685.2434526346.

The spelling of 321761949 in words is "three hundred twenty-one million, seven hundred sixty-one thousand, nine hundred forty-nine".