720774036397 has 2 divisors, whose sum is σ = 720774036398. Its totient is φ = 720774036396.

The previous prime is 720774036371. The next prime is 720774036421. The reversal of 720774036397 is 793630477027.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 445835308681 + 274938727716 = 667709^2 + 524346^2 .

It is an emirp because it is prime and its reverse (793630477027) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 720774036397 - 2¹⁵ = 720774003629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (720774036797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 360387018198 + 360387018199.

It is an arithmetic number, because the mean of its divisors is an integer number (360387018199).

Almost surely, 2^720774036397 is an apocalyptic number.

It is an amenable number.

720774036397 is a deficient number, since it is larger than the sum of its proper divisors (1).

720774036397 is an equidigital number, since it uses as much as digits as its factorization.

720774036397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9335088, while the sum is 55.

The spelling of 720774036397 in words is "seven hundred twenty billion, seven hundred seventy-four million, thirty-six thousand, three hundred ninety-seven".