29987901 has 12 divisors (see below), whose sum is σ = 44920512. Its totient is φ = 19991772.

The previous prime is 29987897. The next prime is 29987911. The reversal of 29987901 is 10978992.

It is not a de Polignac number, because 29987901 - 2² = 29987897 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29987911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 61461 + ... + 61946.

It is an arithmetic number, because the mean of its divisors is an integer number (3743376).

Almost surely, 2^29987901 is an apocalyptic number.

It is an amenable number.

29987901 is a deficient number, since it is larger than the sum of its proper divisors (14932611).

29987901 is an equidigital number, since it uses as much as digits as its factorization.

29987901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123422 (or 123410 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 45.

The square root of 29987901 is about 5476.1209811325. The cubic root of 29987901 is about 310.6814734163.

The spelling of 29987901 in words is "twenty-nine million, nine hundred eighty-seven thousand, nine hundred one".