29979725 has 6 divisors (see below), whose sum is σ = 37174890. Its totient is φ = 23983760.

The previous prime is 29979709. The next prime is 29979727. The reversal of 29979725 is 52797992.

It can be written as a sum of positive squares in 3 ways, for example, as 5189284 + 24790441 = 2278^2 + 4979^2 .

It is not a de Polignac number, because 29979725 - 2⁴ = 29979709 is a prime.

It is a super-2 number, since 2×29979725² = 1797567822151250, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29979727) 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 5 ways as a sum of consecutive naturals, for example, 599570 + ... + 599619.

It is an arithmetic number, because the mean of its divisors is an integer number (6195815).

Almost surely, 2^29979725 is an apocalyptic number.

29979725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

29979725 is a deficient number, since it is larger than the sum of its proper divisors (7195165).

29979725 is a wasteful number, since it uses less digits than its factorization.

29979725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1199199 (or 1199194 counting only the distinct ones).

The product of its digits is 714420, while the sum is 50.

The square root of 29979725 is about 5475.3744164212. The cubic root of 29979725 is about 310.6532357768.

The spelling of 29979725 in words is "twenty-nine million, nine hundred seventy-nine thousand, seven hundred twenty-five".