1949977605 has 32 divisors (see below), whose sum is σ = 3447131904. Its totient is φ = 936252416.

The previous prime is 1949977597. The next prime is 1949977669. The reversal of 1949977605 is 5067799491.

It is a cyclic number.

It is not a de Polignac number, because 1949977605 - 2³ = 1949977597 is a prime.

It is a congruent number.

It is an unprimeable number.

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 in 31 ways as a sum of consecutive naturals, for example, 160374 + ... + 172103.

It is an arithmetic number, because the mean of its divisors is an integer number (107722872).

Almost surely, 2^1949977605 is an apocalyptic number.

1949977605 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1949977605 is a deficient number, since it is larger than the sum of its proper divisors (1497154299).

1949977605 is a wasteful number, since it uses less digits than its factorization.

1949977605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332525.

The product of its (nonzero) digits is 4286520, while the sum is 57.

The square root of 1949977605 is about 44158.5507574694. The cubic root of 1949977605 is about 1249.3281947402.

It can be divided in two parts, 194 and 9977605, that added together give a palindrome (9977799).

The spelling of 1949977605 in words is "one billion, nine hundred forty-nine million, nine hundred seventy-seven thousand, six hundred five".