280901213 has 2 divisors, whose sum is σ = 280901214. Its totient is φ = 280901212.

The previous prime is 280901197. The next prime is 280901237. The reversal of 280901213 is 312109082.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 143472484 + 137428729 = 11978^2 + 11723^2 .

It is a cyclic number.

It is not a de Polignac number, because 280901213 - 2⁴ = 280901197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (280901273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140450606 + 140450607.

It is an arithmetic number, because the mean of its divisors is an integer number (140450607).

Almost surely, 2^280901213 is an apocalyptic number.

It is an amenable number.

280901213 is a deficient number, since it is larger than the sum of its proper divisors (1).

280901213 is an equidigital number, since it uses as much as digits as its factorization.

280901213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 280901213 is about 16760.1077860496. The cubic root of 280901213 is about 654.9143978413.

The spelling of 280901213 in words is "two hundred eighty million, nine hundred one thousand, two hundred thirteen".