29661957 has 40 divisors (see below), whose sum is σ = 50555736. Its totient is φ = 17169408.

The previous prime is 29661953. The next prime is 29661967. The reversal of 29661957 is 75916692.

It is a happy number.

29661957 is a `hidden beast` number, since 29 + 6 + 619 + 5 + 7 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1846881 + 27815076 = 1359^2 + 5274^2 .

It is not a de Polignac number, because 29661957 - 2² = 29661953 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29661953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 17073 + ... + 18729.

Almost surely, 2^29661957 is an apocalyptic number.

29661957 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

29661957 is a deficient number, since it is larger than the sum of its proper divisors (20893779).

29661957 is a wasteful number, since it uses less digits than its factorization.

29661957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1699 (or 1690 counting only the distinct ones).

The product of its digits is 204120, while the sum is 45.

The square root of 29661957 is about 5446.2791885837. The cubic root of 29661957 is about 309.5517524419.

The spelling of 29661957 in words is "twenty-nine million, six hundred sixty-one thousand, nine hundred fifty-seven".