68452921 has 4 divisors (see below), whose sum is σ = 69613200. Its totient is φ = 67292644.

The previous prime is 68452907. The next prime is 68452927. The reversal of 68452921 is 12925486.

68452921 = 1048² + 1049² + ... + 1106².

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 68452921 - 2¹⁵ = 68420153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68452927) 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, 580051 + ... + 580168.

It is an arithmetic number, because the mean of its divisors is an integer number (17403300).

Almost surely, 2^68452921 is an apocalyptic number.

It is an amenable number.

68452921 is a deficient number, since it is larger than the sum of its proper divisors (1160279).

68452921 is a wasteful number, since it uses less digits than its factorization.

68452921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1160278.

The product of its digits is 34560, while the sum is 37.

The square root of 68452921 is about 8273.6280433677. The cubic root of 68452921 is about 409.0697151025.

The spelling of 68452921 in words is "sixty-eight million, four hundred fifty-two thousand, nine hundred twenty-one".