1012639684 has 27 divisors (see below), whose sum is σ = 2062352397. Its totient is φ = 433797504.

The previous prime is 1012639681. The next prime is 1012639687. The reversal of 1012639684 is 4869362101.

The square root of 1012639684 is 31822.

It is a perfect power (a square), and thus also a powerful number.

It is an interprime number because it is at equal distance from previous prime (1012639681) and next prime (1012639687).

It can be written as a sum of positive squares in only one way, i.e., 901800900 + 110838784 = 30030^2 + 10528^2 .

It is a super-2 number, since 2×1012639684² = 2050878259223239712, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1012639681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 444372 + ... + 446644.

Almost surely, 2^1012639684 is an apocalyptic number.

1012639684 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1012639684 is the 31822-nd square number.

It is an amenable number.

1012639684 is an abundant number, since it is smaller than the sum of its proper divisors (1049712713).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1012639684 is an frugal number, since it uses more digits than its factorization.

1012639684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4564 (or 2282 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 40.

The cubic root of 1012639684 is about 1004.1956003195.

The spelling of 1012639684 in words is "one billion, twelve million, six hundred thirty-nine thousand, six hundred eighty-four".