18351097 has 2 divisors, whose sum is σ = 18351098. Its totient is φ = 18351096.

The previous prime is 18351077. The next prime is 18351107. The reversal of 18351097 is 79015381.

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., 18224361 + 126736 = 4269^2 + 356^2 .

It is a cyclic number.

It is not a de Polignac number, because 18351097 - 2¹¹ = 18349049 is a prime.

It is a super-2 number, since 2×18351097² = 673525522206818, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (18351077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9175548 + 9175549.

It is an arithmetic number, because the mean of its divisors is an integer number (9175549).

Almost surely, 2^18351097 is an apocalyptic number.

It is an amenable number.

18351097 is a deficient number, since it is larger than the sum of its proper divisors (1).

18351097 is an equidigital number, since it uses as much as digits as its factorization.

18351097 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7560, while the sum is 34.

The square root of 18351097 is about 4283.8180400199. The cubic root of 18351097 is about 263.7671318506.

The spelling of 18351097 in words is "eighteen million, three hundred fifty-one thousand, ninety-seven".