72923261 has 2 divisors, whose sum is σ = 72923262. Its totient is φ = 72923260.

The previous prime is 72923231. The next prime is 72923287. The reversal of 72923261 is 16232927.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39062500 + 33860761 = 6250^2 + 5819^2 .

It is a cyclic number.

It is not a de Polignac number, because 72923261 - 2¹⁰ = 72922237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72923231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36461630 + 36461631.

It is an arithmetic number, because the mean of its divisors is an integer number (36461631).

Almost surely, 2^72923261 is an apocalyptic number.

It is an amenable number.

72923261 is a deficient number, since it is larger than the sum of its proper divisors (1).

72923261 is an equidigital number, since it uses as much as digits as its factorization.

72923261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9072, while the sum is 32.

The square root of 72923261 is about 8539.5117541930. The cubic root of 72923261 is about 417.7874215751.

The spelling of 72923261 in words is "seventy-two million, nine hundred twenty-three thousand, two hundred sixty-one".