901213213 has 2 divisors, whose sum is σ = 901213214. Its totient is φ = 901213212.

The previous prime is 901213211. The next prime is 901213223. The reversal of 901213213 is 312312109.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 688432644 + 212780569 = 26238^2 + 14587^2 .

It is a cyclic number.

It is not a de Polignac number, because 901213213 - 2¹ = 901213211 is a prime.

Together with 901213211, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (901213211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 450606606 + 450606607.

It is an arithmetic number, because the mean of its divisors is an integer number (450606607).

Almost surely, 2^901213213 is an apocalyptic number.

It is an amenable number.

901213213 is a deficient number, since it is larger than the sum of its proper divisors (1).

901213213 is an equidigital number, since it uses as much as digits as its factorization.

901213213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 22.

The square root of 901213213 is about 30020.2134069696. The cubic root of 901213213 is about 965.9230210267.

The spelling of 901213213 in words is "nine hundred one million, two hundred thirteen thousand, two hundred thirteen".