4157930621 has 4 divisors (see below), whose sum is σ = 4477771452. Its totient is φ = 3838089792.

The previous prime is 4157930551. The next prime is 4157930627. The reversal of 4157930621 is 1260397514.

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 1486488025 + 2671442596 = 38555^2 + 51686^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4157930621 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4157930627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 159920396 + ... + 159920421.

It is an arithmetic number, because the mean of its divisors is an integer number (1119442863).

Almost surely, 2^4157930621 is an apocalyptic number.

It is an amenable number.

4157930621 is a deficient number, since it is larger than the sum of its proper divisors (319840831).

4157930621 is a wasteful number, since it uses less digits than its factorization.

4157930621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319840830.

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 4157930621 is about 64482.0178111697. The cubic root of 4157930621 is about 1608.0235795419.

The spelling of 4157930621 in words is "four billion, one hundred fifty-seven million, nine hundred thirty thousand, six hundred twenty-one".