72090797 has 2 divisors, whose sum is σ = 72090798. Its totient is φ = 72090796.

The previous prime is 72090793. The next prime is 72090827. The reversal of 72090797 is 79709027.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71132356 + 958441 = 8434^2 + 979^2 .

It is an emirp because it is prime and its reverse (79709027) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72090797 - 2² = 72090793 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72090791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36045398 + 36045399.

It is an arithmetic number, because the mean of its divisors is an integer number (36045399).

Almost surely, 2^72090797 is an apocalyptic number.

It is an amenable number.

72090797 is a deficient number, since it is larger than the sum of its proper divisors (1).

72090797 is an equidigital number, since it uses as much as digits as its factorization.

72090797 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 55566, while the sum is 41.

The square root of 72090797 is about 8490.6299530718. The cubic root of 72090797 is about 416.1915664953.

The spelling of 72090797 in words is "seventy-two million, ninety thousand, seven hundred ninety-seven".