72071429 has 2 divisors, whose sum is σ = 72071430. Its totient is φ = 72071428.

The previous prime is 72071423. The next prime is 72071459. The reversal of 72071429 is 92417027.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51122500 + 20948929 = 7150^2 + 4577^2 .

It is an emirp because it is prime and its reverse (92417027) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72071429 - 2⁸ = 72071173 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 72071395 and 72071404.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72071423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36035714 + 36035715.

It is an arithmetic number, because the mean of its divisors is an integer number (36035715).

Almost surely, 2^72071429 is an apocalyptic number.

It is an amenable number.

72071429 is a deficient number, since it is larger than the sum of its proper divisors (1).

72071429 is an equidigital number, since it uses as much as digits as its factorization.

72071429 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7056, while the sum is 32.

The square root of 72071429 is about 8489.4893250419. The cubic root of 72071429 is about 416.1542916485.

The spelling of 72071429 in words is "seventy-two million, seventy-one thousand, four hundred twenty-nine".