72690973 has 2 divisors, whose sum is σ = 72690974. Its totient is φ = 72690972.

The previous prime is 72690949. The next prime is 72691019. The reversal of 72690973 is 37909627.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 58568409 + 14122564 = 7653^2 + 3758^2 .

It is a cyclic number.

It is not a de Polignac number, because 72690973 - 2¹⁷ = 72559901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72690073) 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, 36345486 + 36345487.

It is an arithmetic number, because the mean of its divisors is an integer number (36345487).

Almost surely, 2^72690973 is an apocalyptic number.

It is an amenable number.

72690973 is a deficient number, since it is larger than the sum of its proper divisors (1).

72690973 is an equidigital number, since it uses as much as digits as its factorization.

72690973 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 142884, while the sum is 43.

The square root of 72690973 is about 8525.9001284322. The cubic root of 72690973 is about 417.3433463938.

The spelling of 72690973 in words is "seventy-two million, six hundred ninety thousand, nine hundred seventy-three".