858261097 has 2 divisors, whose sum is σ = 858261098. Its totient is φ = 858261096.

The previous prime is 858261059. The next prime is 858261101. The reversal of 858261097 is 790162858.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 700607961 + 157653136 = 26469^2 + 12556^2 .

It is a cyclic number.

It is not a de Polignac number, because 858261097 - 2⁷ = 858260969 is a prime.

It is a super-2 number, since 2×858261097² = 1473224221247286818, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (858261007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 429130548 + 429130549.

It is an arithmetic number, because the mean of its divisors is an integer number (429130549).

Almost surely, 2^858261097 is an apocalyptic number.

It is an amenable number.

858261097 is a deficient number, since it is larger than the sum of its proper divisors (1).

858261097 is an equidigital number, since it uses as much as digits as its factorization.

858261097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 241920, while the sum is 46.

The square root of 858261097 is about 29296.0935450445. The cubic root of 858261097 is about 950.3271622954.

The spelling of 858261097 in words is "eight hundred fifty-eight million, two hundred sixty-one thousand, ninety-seven".