464218981 has 2 divisors, whose sum is σ = 464218982. Its totient is φ = 464218980.

The previous prime is 464218973. The next prime is 464218999. The reversal of 464218981 is 189812464.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 366109956 + 98109025 = 19134^2 + 9905^2 .

It is a cyclic number.

It is not a de Polignac number, because 464218981 - 2³ = 464218973 is a prime.

It is a super-2 number, since 2×464218981² = 430998524641356722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (464218961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 232109490 + 232109491.

It is an arithmetic number, because the mean of its divisors is an integer number (232109491).

Almost surely, 2^464218981 is an apocalyptic number.

It is an amenable number.

464218981 is a deficient number, since it is larger than the sum of its proper divisors (1).

464218981 is an equidigital number, since it uses as much as digits as its factorization.

464218981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 110592, while the sum is 43.

The square root of 464218981 is about 21545.7415978193. The cubic root of 464218981 is about 774.2970975402.

The spelling of 464218981 in words is "four hundred sixty-four million, two hundred eighteen thousand, nine hundred eighty-one".