72642079 has 2 divisors, whose sum is σ = 72642080. Its totient is φ = 72642078.

The previous prime is 72642077. The next prime is 72642113. The reversal of 72642079 is 97024627.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72642079 - 2¹ = 72642077 is a prime.

Together with 72642077, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72642077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36321039 + 36321040.

It is an arithmetic number, because the mean of its divisors is an integer number (36321040).

Almost surely, 2^72642079 is an apocalyptic number.

72642079 is a deficient number, since it is larger than the sum of its proper divisors (1).

72642079 is an equidigital number, since it uses as much as digits as its factorization.

72642079 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 42336, while the sum is 37.

The square root of 72642079 is about 8523.0322655731. The cubic root of 72642079 is about 417.2497531017.

The spelling of 72642079 in words is "seventy-two million, six hundred forty-two thousand, seventy-nine".