1627434399 has 4 divisors (see below), whose sum is σ = 2169912536. Its totient is φ = 1084956264.

The previous prime is 1627434359. The next prime is 1627434421. The reversal of 1627434399 is 9934347261.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9934347261 = 3 ⋅3311449087.

It is not a de Polignac number, because 1627434399 - 2⁸ = 1627434143 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1627434329) 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, 271239064 + ... + 271239069.

It is an arithmetic number, because the mean of its divisors is an integer number (542478134).

Almost surely, 2^1627434399 is an apocalyptic number.

1627434399 is a deficient number, since it is larger than the sum of its proper divisors (542478137).

1627434399 is an equidigital number, since it uses as much as digits as its factorization.

1627434399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 542478136.

The product of its digits is 979776, while the sum is 48.

The square root of 1627434399 is about 40341.4724446196. The cubic root of 1627434399 is about 1176.2541367616.

The spelling of 1627434399 in words is "one billion, six hundred twenty-seven million, four hundred thirty-four thousand, three hundred ninety-nine".