1976498681 has 2 divisors, whose sum is σ = 1976498682. Its totient is φ = 1976498680.

The previous prime is 1976498677. The next prime is 1976498701. The reversal of 1976498681 is 1868946791.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1974913600 + 1585081 = 44440^2 + 1259^2 .

It is a cyclic number.

It is not a de Polignac number, because 1976498681 - 2² = 1976498677 is a prime.

It is a super-2 number, since 2×1976498681² = 7813094071989479522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1976498681.

It is not a weakly prime, because it can be changed into another prime (1976498281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 988249340 + 988249341.

It is an arithmetic number, because the mean of its divisors is an integer number (988249341).

Almost surely, 2^1976498681 is an apocalyptic number.

It is an amenable number.

1976498681 is a deficient number, since it is larger than the sum of its proper divisors (1).

1976498681 is an equidigital number, since it uses as much as digits as its factorization.

1976498681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5225472, while the sum is 59.

The square root of 1976498681 is about 44457.8303676641. The cubic root of 1976498681 is about 1254.9666252507.

The spelling of 1976498681 in words is "one billion, nine hundred seventy-six million, four hundred ninety-eight thousand, six hundred eighty-one".