452777981 has 2 divisors, whose sum is σ = 452777982. Its totient is φ = 452777980.

The previous prime is 452777951. The next prime is 452777989. The reversal of 452777981 is 189777254.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 412455481 + 40322500 = 20309^2 + 6350^2 .

It is a cyclic number.

It is not a de Polignac number, because 452777981 - 2¹⁰ = 452776957 is a prime.

It is a super-2 number, since 2×452777981² = 410015800156872722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (452777989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 226388990 + 226388991.

It is an arithmetic number, because the mean of its divisors is an integer number (226388991).

Almost surely, 2^452777981 is an apocalyptic number.

It is an amenable number.

452777981 is a deficient number, since it is larger than the sum of its proper divisors (1).

452777981 is an equidigital number, since it uses as much as digits as its factorization.

452777981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 987840, while the sum is 50.

The square root of 452777981 is about 21278.5803332835. The cubic root of 452777981 is about 767.8830823582.

The spelling of 452777981 in words is "four hundred fifty-two million, seven hundred seventy-seven thousand, nine hundred eighty-one".