29668725 has 18 divisors (see below), whose sum is σ = 53140386. Its totient is φ = 15823200.

The previous prime is 29668721. The next prime is 29668759. The reversal of 29668725 is 52786692.

It can be written as a sum of positive squares in 3 ways, for example, as 53361 + 29615364 = 231^2 + 5442^2 .

It is not a de Polignac number, because 29668725 - 2² = 29668721 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29668721) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 65706 + ... + 66155.

Almost surely, 2^29668725 is an apocalyptic number.

29668725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

29668725 is a deficient number, since it is larger than the sum of its proper divisors (23471661).

29668725 is a wasteful number, since it uses less digits than its factorization.

29668725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131877 (or 131869 counting only the distinct ones).

The product of its digits is 362880, while the sum is 45.

The square root of 29668725 is about 5446.9004947768. The cubic root of 29668725 is about 309.5752942347.

The spelling of 29668725 in words is "twenty-nine million, six hundred sixty-eight thousand, seven hundred twenty-five".