72899423 has 2 divisors, whose sum is σ = 72899424. Its totient is φ = 72899422.

The previous prime is 72899419. The next prime is 72899429. The reversal of 72899423 is 32499827.

It is a weak prime.

It is an emirp because it is prime and its reverse (32499827) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72899423 - 2² = 72899419 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72899429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36449711 + 36449712.

It is an arithmetic number, because the mean of its divisors is an integer number (36449712).

Almost surely, 2^72899423 is an apocalyptic number.

72899423 is a deficient number, since it is larger than the sum of its proper divisors (1).

72899423 is an equidigital number, since it uses as much as digits as its factorization.

72899423 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 217728, while the sum is 44.

The square root of 72899423 is about 8538.1158928654. The cubic root of 72899423 is about 417.7418928837.

The spelling of 72899423 in words is "seventy-two million, eight hundred ninety-nine thousand, four hundred twenty-three".