720537101 has 2 divisors, whose sum is σ = 720537102. Its totient is φ = 720537100.

The previous prime is 720537089. The next prime is 720537107. The reversal of 720537101 is 101735027.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 389115076 + 331422025 = 19726^2 + 18205^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-720537101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (720537107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 360268550 + 360268551.

It is an arithmetic number, because the mean of its divisors is an integer number (360268551).

Almost surely, 2^720537101 is an apocalyptic number.

It is an amenable number.

720537101 is a deficient number, since it is larger than the sum of its proper divisors (1).

720537101 is an equidigital number, since it uses as much as digits as its factorization.

720537101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1470, while the sum is 26.

The square root of 720537101 is about 26842.8221504372. The cubic root of 720537101 is about 896.5037612288.

The spelling of 720537101 in words is "seven hundred twenty million, five hundred thirty-seven thousand, one hundred one".