1020681477 has 24 divisors (see below), whose sum is σ = 1526779800. Its totient is φ = 656291328.

The previous prime is 1020681443. The next prime is 1020681491. The reversal of 1020681477 is 7741860201.

1020681477 is a `hidden beast` number, since 102 + 0 + 6 + 81 + 477 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 607819716 + 412861761 = 24654^2 + 20319^2 .

It is not a de Polignac number, because 1020681477 - 2⁶ = 1020681413 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020681407) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 372649 + ... + 375377.

It is an arithmetic number, because the mean of its divisors is an integer number (63615825).

Almost surely, 2^1020681477 is an apocalyptic number.

It is an amenable number.

1020681477 is a deficient number, since it is larger than the sum of its proper divisors (506098323).

1020681477 is a wasteful number, since it uses less digits than its factorization.

1020681477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4197 (or 4194 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 36.

The square root of 1020681477 is about 31948.1060001998. The cubic root of 1020681477 is about 1006.8468394645.

The spelling of 1020681477 in words is "one billion, twenty million, six hundred eighty-one thousand, four hundred seventy-seven".