1679032981 has 4 divisors (see below), whose sum is σ = 1736930700. Its totient is φ = 1621135264.

The previous prime is 1679032969. The next prime is 1679033003. The reversal of 1679032981 is 1892309761.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1892309761 = 257 ⋅7363073.

It can be written as a sum of positive squares in 2 ways, for example, as 1240800625 + 438232356 = 35225^2 + 20934^2 .

It is not a de Polignac number, because 1679032981 - 2⁷ = 1679032853 is a prime.

It is a super-2 number, since 2×1679032981² = 5638303502571492722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1679038981) 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, 28948816 + ... + 28948873.

It is an arithmetic number, because the mean of its divisors is an integer number (434232675).

Almost surely, 2^1679032981 is an apocalyptic number.

It is an amenable number.

1679032981 is a deficient number, since it is larger than the sum of its proper divisors (57897719).

1679032981 is an equidigital number, since it uses as much as digits as its factorization.

1679032981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57897718.

The product of its (nonzero) digits is 163296, while the sum is 46.

The square root of 1679032981 is about 40976.0049419169. The cubic root of 1679032981 is about 1188.5562560822.

The spelling of 1679032981 in words is "one billion, six hundred seventy-nine million, thirty-two thousand, nine hundred eighty-one".