29969495689 has 15 divisors (see below), whose sum is σ = 34972230023. Its totient is φ = 25680868248.

The previous prime is 29969495671. The next prime is 29969495711. The reversal of 29969495689 is 98659496992.

The square root of 29969495689 is 173117.

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

It can be written as a sum of positive squares in only one way, i.e., 24509468025 + 5460027664 = 156555^2 + 73892^2 .

It is not a de Polignac number, because 29969495689 - 2⁵ = 29969495657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (29969495629) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 8480967 + ... + 8484499.

Almost surely, 2^29969495689 is an apocalyptic number.

29969495689 is the 173117-th square number.

29969495689 is the 86559-th centered octagonal number.

It is an amenable number.

29969495689 is a deficient number, since it is larger than the sum of its proper divisors (5002734334).

29969495689 is an frugal number, since it uses more digits than its factorization.

29969495689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7094 (or 3540 counting only the distinct ones).

The product of its digits is 680244480, while the sum is 76.

The spelling of 29969495689 in words is "twenty-nine billion, nine hundred sixty-nine million, four hundred ninety-five thousand, six hundred eighty-nine".