29987397 has 12 divisors (see below), whose sum is σ = 47253024. Its totient is φ = 18174120.

The previous prime is 29987357. The next prime is 29987401. The reversal of 29987397 is 79378992.

It is not a de Polignac number, because 29987397 - 2⁸ = 29987141 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29987357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 151353 + ... + 151550.

It is an arithmetic number, because the mean of its divisors is an integer number (3937752).

Almost surely, 2^29987397 is an apocalyptic number.

It is an amenable number.

29987397 is a deficient number, since it is larger than the sum of its proper divisors (17265627).

29987397 is a wasteful number, since it uses less digits than its factorization.

29987397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302920 (or 302917 counting only the distinct ones).

The product of its digits is 1714608, while the sum is 54.

The square root of 29987397 is about 5476.0749629639. The cubic root of 29987397 is about 310.6797328884.

The spelling of 29987397 in words is "twenty-nine million, nine hundred eighty-seven thousand, three hundred ninety-seven".