29749494749 has 4 divisors (see below), whose sum is σ = 32037917436. Its totient is φ = 27461072064.

The previous prime is 29749494679. The next prime is 29749494779. The reversal of 29749494749 is 94749494792.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7672884025 + 22076610724 = 87595^2 + 148582^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-29749494749 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29749494779) 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, 1144211324 + ... + 1144211349.

It is an arithmetic number, because the mean of its divisors is an integer number (8009479359).

Almost surely, 2^29749494749 is an apocalyptic number.

It is an amenable number.

29749494749 is a deficient number, since it is larger than the sum of its proper divisors (2288422687).

29749494749 is a wasteful number, since it uses less digits than its factorization.

29749494749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2288422686.

The product of its digits is 164602368, while the sum is 68.

The spelling of 29749494749 in words is "twenty-nine billion, seven hundred forty-nine million, four hundred ninety-four thousand, seven hundred forty-nine".