213479085961 has 2 divisors, whose sum is σ = 213479085962. Its totient is φ = 213479085960.

The previous prime is 213479085929. The next prime is 213479085971. The reversal of 213479085961 is 169580974312.

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., 122881095936 + 90597990025 = 350544^2 + 300995^2 .

It is a cyclic number.

It is not a de Polignac number, because 213479085961 - 2⁵ = 213479085929 is a prime.

It is not a weakly prime, because it can be changed into another prime (213479085971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106739542980 + 106739542981.

It is an arithmetic number, because the mean of its divisors is an integer number (106739542981).

It is a 1-persistent number, because it is pandigital, but 2⋅213479085961 = 426958171922 is not.

Almost surely, 2^213479085961 is an apocalyptic number.

It is an amenable number.

213479085961 is a deficient number, since it is larger than the sum of its proper divisors (1).

213479085961 is an equidigital number, since it uses as much as digits as its factorization.

213479085961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3265920, while the sum is 55.

The spelling of 213479085961 in words is "two hundred thirteen billion, four hundred seventy-nine million, eighty-five thousand, nine hundred sixty-one".