29981903 has 16 divisors (see below), whose sum is σ = 36258816. Its totient is φ = 24235200.

The previous prime is 29981893. The next prime is 29981977. The reversal of 29981903 is 30918992.

It is a cyclic number.

It is not a de Polignac number, because 29981903 - 2¹⁴ = 29965519 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 (29981603) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10478 + ... + 13028.

It is an arithmetic number, because the mean of its divisors is an integer number (2266176).

Almost surely, 2^29981903 is an apocalyptic number.

29981903 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

29981903 is a deficient number, since it is larger than the sum of its proper divisors (6276913).

29981903 is a wasteful number, since it uses less digits than its factorization.

29981903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2654.

The product of its (nonzero) digits is 34992, while the sum is 41.

The square root of 29981903 is about 5475.5733033172. The cubic root of 29981903 is about 310.6607584872.

The spelling of 29981903 in words is "twenty-nine million, nine hundred eighty-one thousand, nine hundred three".