825291097 has 4 divisors (see below), whose sum is σ = 826023220. Its totient is φ = 824558976.

The previous prime is 825291079. The next prime is 825291101. The reversal of 825291097 is 790192528.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 289646361 + 535644736 = 17019^2 + 23144^2 .

It is a cyclic number.

It is not a de Polignac number, because 825291097 - 2⁷ = 825290969 is a prime.

It is a super-2 number, since 2×825291097² = 1362210789574926818, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (825291017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 364368 + ... + 366625.

It is an arithmetic number, because the mean of its divisors is an integer number (206505805).

Almost surely, 2^825291097 is an apocalyptic number.

It is an amenable number.

825291097 is a deficient number, since it is larger than the sum of its proper divisors (732123).

825291097 is a wasteful number, since it uses less digits than its factorization.

825291097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 732122.

The product of its (nonzero) digits is 90720, while the sum is 43.

The square root of 825291097 is about 28727.8801341136. The cubic root of 825291097 is about 937.9990244473. Note that the first 3 decimals are identical.

The spelling of 825291097 in words is "eight hundred twenty-five million, two hundred ninety-one thousand, ninety-seven".