462199981 has 2 divisors, whose sum is σ = 462199982. Its totient is φ = 462199980.

The previous prime is 462199979. The next prime is 462200059. The reversal of 462199981 is 189991264.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 437855625 + 24344356 = 20925^2 + 4934^2 .

It is a cyclic number.

It is not a de Polignac number, because 462199981 - 2¹ = 462199979 is a prime.

It is a super-2 number, since 2×462199981² = 427257644872800722, which contains 22 as substring.

Together with 462199979, 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 (462194981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 231099990 + 231099991.

It is an arithmetic number, because the mean of its divisors is an integer number (231099991).

Almost surely, 2^462199981 is an apocalyptic number.

It is an amenable number.

462199981 is a deficient number, since it is larger than the sum of its proper divisors (1).

462199981 is an equidigital number, since it uses as much as digits as its factorization.

462199981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 279936, while the sum is 49.

The square root of 462199981 is about 21498.8367359725. The cubic root of 462199981 is about 773.1729314362.

The spelling of 462199981 in words is "four hundred sixty-two million, one hundred ninety-nine thousand, nine hundred eighty-one".