72023869 has 2 divisors, whose sum is σ = 72023870. Its totient is φ = 72023868.

The previous prime is 72023843. The next prime is 72023893. The reversal of 72023869 is 96832027.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66618244 + 5405625 = 8162^2 + 2325^2 .

It is a cyclic number.

It is not a de Polignac number, because 72023869 - 2¹³ = 72015677 is a prime.

It is a super-2 number, since 2×72023869² = 10374875411458322, which contains 22 as substring.

It is equal to p_4229974 and since 72023869 and 4229974 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72023069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36011934 + 36011935.

It is an arithmetic number, because the mean of its divisors is an integer number (36011935).

Almost surely, 2^72023869 is an apocalyptic number.

It is an amenable number.

72023869 is a deficient number, since it is larger than the sum of its proper divisors (1).

72023869 is an equidigital number, since it uses as much as digits as its factorization.

72023869 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 72023869 is about 8486.6877520031. The cubic root of 72023869 is about 416.0627313097.

The spelling of 72023869 in words is "seventy-two million, twenty-three thousand, eight hundred sixty-nine".