1011861423 has 32 divisors (see below), whose sum is σ = 1545857280. Its totient is φ = 653758560.

The previous prime is 1011861413. The next prime is 1011861479. The reversal of 1011861423 is 3241681101.

It is a happy number.

1011861423 is a `hidden beast` number, since 10 + 1 + 18 + 614 + 23 = 666.

It is not a de Polignac number, because 1011861423 - 2¹⁸ = 1011599279 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011861413) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 148765 + ... + 155417.

It is an arithmetic number, because the mean of its divisors is an integer number (48308040).

Almost surely, 2^1011861423 is an apocalyptic number.

1011861423 is a deficient number, since it is larger than the sum of its proper divisors (533995857).

1011861423 is a wasteful number, since it uses less digits than its factorization.

1011861423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6836 (or 6830 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 1011861423 is about 31809.7693012697. The cubic root of 1011861423 is about 1003.9382772778.

The spelling of 1011861423 in words is "one billion, eleven million, eight hundred sixty-one thousand, four hundred twenty-three".