240213997 has 2 divisors, whose sum is σ = 240213998. Its totient is φ = 240213996.

The previous prime is 240213991. The next prime is 240214021. The reversal of 240213997 is 799312042.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 223981156 + 16232841 = 14966^2 + 4029^2 .

It is a cyclic number.

It is not a de Polignac number, because 240213997 - 2¹⁵ = 240181229 is a prime.

It is a super-3 number, since 3×240213997³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (240213991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120106998 + 120106999.

It is an arithmetic number, because the mean of its divisors is an integer number (120106999).

Almost surely, 2^240213997 is an apocalyptic number.

It is an amenable number.

240213997 is a deficient number, since it is larger than the sum of its proper divisors (1).

240213997 is an equidigital number, since it uses as much as digits as its factorization.

240213997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 240213997 is about 15498.8385693896. The cubic root of 240213997 is about 621.6311514410.

The spelling of 240213997 in words is "two hundred forty million, two hundred thirteen thousand, nine hundred ninety-seven".