72917941 has 2 divisors, whose sum is σ = 72917942. Its totient is φ = 72917940.

The previous prime is 72917927. The next prime is 72917963. The reversal of 72917941 is 14971927.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62869041 + 10048900 = 7929^2 + 3170^2 .

It is a cyclic number.

It is not a de Polignac number, because 72917941 - 2²⁵ = 39363509 is a prime.

It is a super-2 number, since 2×72917941² = 10634052239358962, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 72917894 and 72917903.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72912941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36458970 + 36458971.

It is an arithmetic number, because the mean of its divisors is an integer number (36458971).

Almost surely, 2^72917941 is an apocalyptic number.

It is an amenable number.

72917941 is a deficient number, since it is larger than the sum of its proper divisors (1).

72917941 is an equidigital number, since it uses as much as digits as its factorization.

72917941 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31752, while the sum is 40.

The square root of 72917941 is about 8539.2002552932. The cubic root of 72917941 is about 417.7772616567. Note that the first 3 decimals are identical.

The spelling of 72917941 in words is "seventy-two million, nine hundred seventeen thousand, nine hundred forty-one".