4517691421 has 2 divisors, whose sum is σ = 4517691422. Its totient is φ = 4517691420.

The previous prime is 4517691397. The next prime is 4517691439. The reversal of 4517691421 is 1241967154.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4516512025 + 1179396 = 67205^2 + 1086^2 .

It is a cyclic number.

It is not a de Polignac number, because 4517691421 - 2¹³ = 4517683229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4517695421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2258845710 + 2258845711.

It is an arithmetic number, because the mean of its divisors is an integer number (2258845711).

Almost surely, 2^4517691421 is an apocalyptic number.

It is an amenable number.

4517691421 is a deficient number, since it is larger than the sum of its proper divisors (1).

4517691421 is an equidigital number, since it uses as much as digits as its factorization.

4517691421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60480, while the sum is 40.

The square root of 4517691421 is about 67213.7740422304. The cubic root of 4517691421 is about 1653.1243429426.

The spelling of 4517691421 in words is "four billion, five hundred seventeen million, six hundred ninety-one thousand, four hundred twenty-one".