861151297 has 2 divisors, whose sum is σ = 861151298. Its totient is φ = 861151296.

The previous prime is 861151267. The next prime is 861151309. The reversal of 861151297 is 792151168.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 859603761 + 1547536 = 29319^2 + 1244^2 .

It is a cyclic number.

It is not a de Polignac number, because 861151297 - 2⁷ = 861151169 is a prime.

It is not a weakly prime, because it can be changed into another prime (861151217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 430575648 + 430575649.

It is an arithmetic number, because the mean of its divisors is an integer number (430575649).

Almost surely, 2^861151297 is an apocalyptic number.

It is an amenable number.

861151297 is a deficient number, since it is larger than the sum of its proper divisors (1).

861151297 is an equidigital number, since it uses as much as digits as its factorization.

861151297 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30240, while the sum is 40.

The square root of 861151297 is about 29345.3794829782. The cubic root of 861151297 is about 951.3927114717.

The spelling of 861151297 in words is "eight hundred sixty-one million, one hundred fifty-one thousand, two hundred ninety-seven".