1065971949 has 16 divisors (see below), whose sum is σ = 1630385280. Its totient is φ = 606859200.

The previous prime is 1065971923. The next prime is 1065971969. The reversal of 1065971949 is 9491795601.

It is not a de Polignac number, because 1065971949 - 2⁵ = 1065971917 is a prime.

It is a super-2 number, since 2×1065971949² = 2272592392109717202, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1065971969) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 88702 + ... + 99999.

It is an arithmetic number, because the mean of its divisors is an integer number (101899080).

Almost surely, 2^1065971949 is an apocalyptic number.

It is an amenable number.

1065971949 is a deficient number, since it is larger than the sum of its proper divisors (564413331).

1065971949 is a wasteful number, since it uses less digits than its factorization.

1065971949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188980.

The product of its (nonzero) digits is 612360, while the sum is 51.

The square root of 1065971949 is about 32649.2258560597. The cubic root of 1065971949 is about 1021.5240413916.

The spelling of 1065971949 in words is "one billion, sixty-five million, nine hundred seventy-one thousand, nine hundred forty-nine".