401489953 has 2 divisors, whose sum is σ = 401489954. Its totient is φ = 401489952.

The previous prime is 401489951. The next prime is 401489981. The reversal of 401489953 is 359984104.

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., 253064464 + 148425489 = 15908^2 + 12183^2 .

It is a cyclic number.

It is not a de Polignac number, because 401489953 - 2¹ = 401489951 is a prime.

It is a super-2 number, since 2×401489953² = 322388364719884418, which contains 22 as substring.

Together with 401489951, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (401489951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200744976 + 200744977.

It is an arithmetic number, because the mean of its divisors is an integer number (200744977).

Almost surely, 2^401489953 is an apocalyptic number.

It is an amenable number.

401489953 is a deficient number, since it is larger than the sum of its proper divisors (1).

401489953 is an equidigital number, since it uses as much as digits as its factorization.

401489953 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 155520, while the sum is 43.

The square root of 401489953 is about 20037.2142025782. The cubic root of 401489953 is about 737.7200051475.

The spelling of 401489953 in words is "four hundred one million, four hundred eighty-nine thousand, nine hundred fifty-three".