29681963497 has 2 divisors, whose sum is σ = 29681963498. Its totient is φ = 29681963496.

The previous prime is 29681963453. The next prime is 29681963537. The reversal of 29681963497 is 79436918692.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26557265296 + 3124698201 = 162964^2 + 55899^2 .

It is a cyclic number.

It is not a de Polignac number, because 29681963497 - 2²⁷ = 29547745769 is a prime.

It is not a weakly prime, because it can be changed into another prime (29681963897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14840981748 + 14840981749.

It is an arithmetic number, because the mean of its divisors is an integer number (14840981749).

Almost surely, 2^29681963497 is an apocalyptic number.

It is an amenable number.

29681963497 is a deficient number, since it is larger than the sum of its proper divisors (1).

29681963497 is an equidigital number, since it uses as much as digits as its factorization.

29681963497 is an evil number, because the sum of its binary digits is even.

The product of its digits is 35271936, while the sum is 64.

The spelling of 29681963497 in words is "twenty-nine billion, six hundred eighty-one million, nine hundred sixty-three thousand, four hundred ninety-seven".