1012115783 has 4 divisors (see below), whose sum is σ = 1156703760. Its totient is φ = 867527808.

The previous prime is 1012115779. The next prime is 1012115821. The reversal of 1012115783 is 3875112101.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3875112101 = 7 ⋅553587443.

It is not a de Polignac number, because 1012115783 - 2² = 1012115779 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 (1012115773) 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, 72293978 + ... + 72293991.

It is an arithmetic number, because the mean of its divisors is an integer number (289175940).

Almost surely, 2^1012115783 is an apocalyptic number.

1012115783 is a deficient number, since it is larger than the sum of its proper divisors (144587977).

1012115783 is an equidigital number, since it uses as much as digits as its factorization.

1012115783 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144587976.

The product of its (nonzero) digits is 1680, while the sum is 29.

The square root of 1012115783 is about 31813.7671928365. The cubic root of 1012115783 is about 1004.0223929943.

Adding to 1012115783 its reverse (3875112101), we get a palindrome (4887227884).

The spelling of 1012115783 in words is "one billion, twelve million, one hundred fifteen thousand, seven hundred eighty-three".