29973997 has 4 divisors (see below), whose sum is σ = 30465436. Its totient is φ = 29482560.

The previous prime is 29973971. The next prime is 29974031. The reversal of 29973997 is 79937992.

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 2996361 + 26977636 = 1731^2 + 5194^2 .

It is a cyclic number.

It is not a de Polignac number, because 29973997 - 2¹⁹ = 29449709 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 (29973917) 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, 245628 + ... + 245749.

It is an arithmetic number, because the mean of its divisors is an integer number (7616359).

Almost surely, 2^29973997 is an apocalyptic number.

It is an amenable number.

29973997 is a deficient number, since it is larger than the sum of its proper divisors (491439).

29973997 is an equidigital number, since it uses as much as digits as its factorization.

29973997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 491438.

The product of its digits is 1928934, while the sum is 55.

The square root of 29973997 is about 5474.8513221822. The cubic root of 29973997 is about 310.6334497929.

The spelling of 29973997 in words is "twenty-nine million, nine hundred seventy-three thousand, nine hundred ninety-seven".