64121173 has 2 divisors, whose sum is σ = 64121174. Its totient is φ = 64121172.

The previous prime is 64121159. The next prime is 64121203. The reversal of 64121173 is 37112146.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 58706244 + 5414929 = 7662^2 + 2327^2 .

It is a cyclic number.

It is not a de Polignac number, because 64121173 - 2¹³ = 64112981 is a prime.

It is a super-2 number, since 2×64121173² = 8223049653791858, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64121273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32060586 + 32060587.

It is an arithmetic number, because the mean of its divisors is an integer number (32060587).

Almost surely, 2^64121173 is an apocalyptic number.

It is an amenable number.

64121173 is a deficient number, since it is larger than the sum of its proper divisors (1).

64121173 is an equidigital number, since it uses as much as digits as its factorization.

64121173 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1008, while the sum is 25.

The square root of 64121173 is about 8007.5697311981. The cubic root of 64121173 is about 400.2522845978.

The spelling of 64121173 in words is "sixty-four million, one hundred twenty-one thousand, one hundred seventy-three".