29920477 has 4 divisors (see below), whose sum is σ = 29934396. Its totient is φ = 29906560.

The previous prime is 29920469. The next prime is 29920481. The reversal of 29920477 is 77402992.

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

It can be written as a sum of positive squares in 2 ways, for example, as 26152996 + 3767481 = 5114^2 + 1941^2 .

It is a cyclic number.

It is not a de Polignac number, because 29920477 - 2³ = 29920469 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 (29920417) 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 3 ways as a sum of consecutive naturals, for example, 2974 + ... + 8287.

It is an arithmetic number, because the mean of its divisors is an integer number (7483599).

Almost surely, 2^29920477 is an apocalyptic number.

It is an amenable number.

29920477 is a deficient number, since it is larger than the sum of its proper divisors (13919).

29920477 is a wasteful number, since it uses less digits than its factorization.

29920477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13918.

The product of its (nonzero) digits is 63504, while the sum is 40.

The square root of 29920477 is about 5469.9613344154. The cubic root of 29920477 is about 310.4484560350.

The spelling of 29920477 in words is "twenty-nine million, nine hundred twenty thousand, four hundred seventy-seven".