461369981 has 4 divisors (see below), whose sum is σ = 461932764. Its totient is φ = 460807200.

The previous prime is 461369969. The next prime is 461370031. The reversal of 461369981 is 189963164.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 72097081 + 389272900 = 8491^2 + 19730^2 .

It is a cyclic number.

It is not a de Polignac number, because 461369981 - 2⁶ = 461369917 is a prime.

It is a super-2 number, since 2×461369981² = 425724518735880722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (461369921) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 280160 + ... + 281801.

It is an arithmetic number, because the mean of its divisors is an integer number (115483191).

Almost surely, 2^461369981 is an apocalyptic number.

It is an amenable number.

461369981 is a deficient number, since it is larger than the sum of its proper divisors (562783).

461369981 is an equidigital number, since it uses as much as digits as its factorization.

461369981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 562782.

The product of its digits is 279936, while the sum is 47.

The square root of 461369981 is about 21479.5246921341. The cubic root of 461369981 is about 772.7098432520.

The spelling of 461369981 in words is "four hundred sixty-one million, three hundred sixty-nine thousand, nine hundred eighty-one".