29172427 has 2 divisors, whose sum is σ = 29172428. Its totient is φ = 29172426.

The previous prime is 29172421. The next prime is 29172431. The reversal of 29172427 is 72427192.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-29172427 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 29172392 and 29172401.

It is not a weakly prime, because it can be changed into another prime (29172421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14586213 + 14586214.

It is an arithmetic number, because the mean of its divisors is an integer number (14586214).

Almost surely, 2^29172427 is an apocalyptic number.

29172427 is a deficient number, since it is larger than the sum of its proper divisors (1).

29172427 is an equidigital number, since it uses as much as digits as its factorization.

29172427 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14112, while the sum is 34.

The square root of 29172427 is about 5401.1505255825. The cubic root of 29172427 is about 307.8393882066.

The spelling of 29172427 in words is "twenty-nine million, one hundred seventy-two thousand, four hundred twenty-seven".