1084720397 has 2 divisors, whose sum is σ = 1084720398. Its totient is φ = 1084720396.

The previous prime is 1084720387. The next prime is 1084720421. The reversal of 1084720397 is 7930274801.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 629708836 + 455011561 = 25094^2 + 21331^2 .

It is a cyclic number.

It is not a de Polignac number, because 1084720397 - 2⁶ = 1084720333 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1084720327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 542360198 + 542360199.

It is an arithmetic number, because the mean of its divisors is an integer number (542360199).

Almost surely, 2^1084720397 is an apocalyptic number.

It is an amenable number.

1084720397 is a deficient number, since it is larger than the sum of its proper divisors (1).

1084720397 is an equidigital number, since it uses as much as digits as its factorization.

1084720397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 84672, while the sum is 41.

The square root of 1084720397 is about 32935.0936995783. The cubic root of 1084720397 is about 1027.4781668845.

The spelling of 1084720397 in words is "one billion, eighty-four million, seven hundred twenty thousand, three hundred ninety-seven".