1055609879 has 4 divisors (see below), whose sum is σ = 1055792184. Its totient is φ = 1055427576.

The previous prime is 1055609873. The next prime is 1055610089. The reversal of 1055609879 is 9789065501.

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: 9789065501 = 367 ⋅26673203.

It is a cyclic number.

It is not a de Polignac number, because 1055609879 - 2¹² = 1055605783 is a prime.

It is a super-2 number, since 2×1055609879² = 2228624433284789282, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1055609873) 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, 82172 + ... + 94145.

It is an arithmetic number, because the mean of its divisors is an integer number (263948046).

Almost surely, 2^1055609879 is an apocalyptic number.

1055609879 is a deficient number, since it is larger than the sum of its proper divisors (182305).

1055609879 is an equidigital number, since it uses as much as digits as its factorization.

1055609879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182304.

The product of its (nonzero) digits is 680400, while the sum is 50.

The square root of 1055609879 is about 32490.1504921107. The cubic root of 1055609879 is about 1018.2032571603.

The spelling of 1055609879 in words is "one billion, fifty-five million, six hundred nine thousand, eight hundred seventy-nine".