1627434401 has 4 divisors (see below), whose sum is σ = 1634419332. Its totient is φ = 1620449472.

The previous prime is 1627434359. The next prime is 1627434421. The reversal of 1627434401 is 1044347261.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1044347261 = 3617 ⋅288733.

It can be written as a sum of positive squares in 2 ways, for example, as 100500625 + 1526933776 = 10025^2 + 39076^2 .

It is a cyclic number.

It is not a de Polignac number, because 1627434401 - 2⁶ = 1627434337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1627434421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3492116 + ... + 3492581.

It is an arithmetic number, because the mean of its divisors is an integer number (408604833).

Almost surely, 2^1627434401 is an apocalyptic number.

It is an amenable number.

1627434401 is a deficient number, since it is larger than the sum of its proper divisors (6984931).

1627434401 is an equidigital number, since it uses as much as digits as its factorization.

1627434401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6984930.

The product of its (nonzero) digits is 16128, while the sum is 32.

The square root of 1627434401 is about 40341.4724694080. The cubic root of 1627434401 is about 1176.2541372434.

The spelling of 1627434401 in words is "one billion, six hundred twenty-seven million, four hundred thirty-four thousand, four hundred one".