72853969 has 2 divisors, whose sum is σ = 72853970. Its totient is φ = 72853968.

The previous prime is 72853951. The next prime is 72853973. The reversal of 72853969 is 96935827.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 72846225 + 7744 = 8535^2 + 88^2 .

It is a cyclic number.

It is not a de Polignac number, because 72853969 - 2⁷ = 72853841 is a prime.

It is a super-2 number, since 2×72853969² = 10615401598105922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (72853909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36426984 + 36426985.

It is an arithmetic number, because the mean of its divisors is an integer number (36426985).

Almost surely, 2^72853969 is an apocalyptic number.

It is an amenable number.

72853969 is a deficient number, since it is larger than the sum of its proper divisors (1).

72853969 is an equidigital number, since it uses as much as digits as its factorization.

72853969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 816480, while the sum is 49.

The square root of 72853969 is about 8535.4536493382. The cubic root of 72853969 is about 417.6550518313.

The spelling of 72853969 in words is "seventy-two million, eight hundred fifty-three thousand, nine hundred sixty-nine".