445954381 has 2 divisors, whose sum is σ = 445954382. Its totient is φ = 445954380.

The previous prime is 445954363. The next prime is 445954393. The reversal of 445954381 is 183459544.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 230128900 + 215825481 = 15170^2 + 14691^2 .

It is a cyclic number.

It is not a de Polignac number, because 445954381 - 2⁹ = 445953869 is a prime.

It is a super-2 number, since 2×445954381² = 397750619866186322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (445954321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222977190 + 222977191.

It is an arithmetic number, because the mean of its divisors is an integer number (222977191).

Almost surely, 2^445954381 is an apocalyptic number.

It is an amenable number.

445954381 is a deficient number, since it is larger than the sum of its proper divisors (1).

445954381 is an equidigital number, since it uses as much as digits as its factorization.

445954381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 345600, while the sum is 43.

The square root of 445954381 is about 21117.6319931947. The cubic root of 445954381 is about 764.0060744608.

The spelling of 445954381 in words is "four hundred forty-five million, nine hundred fifty-four thousand, three hundred eighty-one".