29979031 has 4 divisors (see below), whose sum is σ = 30051000. Its totient is φ = 29907064.

The previous prime is 29979029. The next prime is 29979043. The reversal of 29979031 is 13097992.

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

It is a cyclic number.

It is not a de Polignac number, because 29979031 - 2¹ = 29979029 is a prime.

It is a super-2 number, since 2×29979031² = 1797484599397922, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29979331) 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, 35356 + ... + 36193.

It is an arithmetic number, because the mean of its divisors is an integer number (7512750).

Almost surely, 2^29979031 is an apocalyptic number.

29979031 is a deficient number, since it is larger than the sum of its proper divisors (71969).

29979031 is an equidigital number, since it uses as much as digits as its factorization.

29979031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71968.

The product of its (nonzero) digits is 30618, while the sum is 40.

The square root of 29979031 is about 5475.3110413930. The cubic root of 29979031 is about 310.6508386567.

The spelling of 29979031 in words is "twenty-nine million, nine hundred seventy-nine thousand, thirty-one".