967645421 has 2 divisors, whose sum is σ = 967645422. Its totient is φ = 967645420.

The previous prime is 967645381. The next prime is 967645453. The reversal of 967645421 is 124546769.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 693742921 + 273902500 = 26339^2 + 16550^2 .

It is a cyclic number.

It is not a de Polignac number, because 967645421 - 2¹⁴ = 967629037 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (967645621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 483822710 + 483822711.

It is an arithmetic number, because the mean of its divisors is an integer number (483822711).

Almost surely, 2^967645421 is an apocalyptic number.

It is an amenable number.

967645421 is a deficient number, since it is larger than the sum of its proper divisors (1).

967645421 is an equidigital number, since it uses as much as digits as its factorization.

967645421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 362880, while the sum is 44.

The square root of 967645421 is about 31106.9995499405. Note that the first 3 decimals coincide. The cubic root of 967645421 is about 989.0966902393.

The spelling of 967645421 in words is "nine hundred sixty-seven million, six hundred forty-five thousand, four hundred twenty-one".