1055408639 has 4 divisors (see below), whose sum is σ = 1060712400. Its totient is φ = 1050104880.

The previous prime is 1055408633. The next prime is 1055408657. The reversal of 1055408639 is 9368045501.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9368045501 = 3877 ⋅2416313.

It is a cyclic number.

It is not a de Polignac number, because 1055408639 - 2¹² = 1055404543 is a prime.

It is a super-2 number, since 2×1055408639² = 2227774790551664642, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1055408596 and 1055408605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1055408633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2651582 + ... + 2651979.

It is an arithmetic number, because the mean of its divisors is an integer number (265178100).

Almost surely, 2^1055408639 is an apocalyptic number.

1055408639 is a deficient number, since it is larger than the sum of its proper divisors (5303761).

1055408639 is an equidigital number, since it uses as much as digits as its factorization.

1055408639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5303760.

The product of its (nonzero) digits is 129600, while the sum is 41.

The square root of 1055408639 is about 32487.0534059339. The cubic root of 1055408639 is about 1018.1385500971.

The spelling of 1055408639 in words is "one billion, fifty-five million, four hundred eight thousand, six hundred thirty-nine".