4170921949 has 2 divisors, whose sum is σ = 4170921950. Its totient is φ = 4170921948.

The previous prime is 4170921929. The next prime is 4170921991. The reversal of 4170921949 is 9491290714.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4133589849 + 37332100 = 64293^2 + 6110^2 .

It is a cyclic number.

It is not a de Polignac number, because 4170921949 - 2⁵ = 4170921917 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4170921899 and 4170921908.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4170921929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2085460974 + 2085460975.

It is an arithmetic number, because the mean of its divisors is an integer number (2085460975).

Almost surely, 2^4170921949 is an apocalyptic number.

It is an amenable number.

4170921949 is a deficient number, since it is larger than the sum of its proper divisors (1).

4170921949 is an equidigital number, since it uses as much as digits as its factorization.

4170921949 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 163296, while the sum is 46.

The square root of 4170921949 is about 64582.6753007337. The cubic root of 4170921949 is about 1609.6965786243.

The spelling of 4170921949 in words is "four billion, one hundred seventy million, nine hundred twenty-one thousand, nine hundred forty-nine".