2705458921 has 4 divisors (see below), whose sum is σ = 2951409744. Its totient is φ = 2459508100.

The previous prime is 2705458919. The next prime is 2705458937. The reversal of 2705458921 is 1298545072.

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 2705458921 - 2¹ = 2705458919 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2705458901) 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, 122975395 + ... + 122975416.

It is an arithmetic number, because the mean of its divisors is an integer number (737852436).

Almost surely, 2^2705458921 is an apocalyptic number.

It is an amenable number.

2705458921 is a deficient number, since it is larger than the sum of its proper divisors (245950823).

2705458921 is a wasteful number, since it uses less digits than its factorization.

2705458921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245950822.

The product of its (nonzero) digits is 201600, while the sum is 43.

The square root of 2705458921 is about 52014.0261948640. The cubic root of 2705458921 is about 1393.4144652525.

The spelling of 2705458921 in words is "two billion, seven hundred five million, four hundred fifty-eight thousand, nine hundred twenty-one".