213740999 has 2 divisors, whose sum is σ = 213741000. Its totient is φ = 213740998.

The previous prime is 213740993. The next prime is 213741029. The reversal of 213740999 is 999047312.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213740999 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213740993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106870499 + 106870500.

It is an arithmetic number, because the mean of its divisors is an integer number (106870500).

Almost surely, 2^213740999 is an apocalyptic number.

213740999 is a deficient number, since it is larger than the sum of its proper divisors (1).

213740999 is an equidigital number, since it uses as much as digits as its factorization.

213740999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 122472, while the sum is 44.

The square root of 213740999 is about 14619.8836862678. The cubic root of 213740999 is about 597.9009979542.

The spelling of 213740999 in words is "two hundred thirteen million, seven hundred forty thousand, nine hundred ninety-nine".