90678097 has 2 divisors, whose sum is σ = 90678098. Its totient is φ = 90678096.

The previous prime is 90678079. The next prime is 90678109. The reversal of 90678097 is 79087609.

Together with previous prime (90678079) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77457601 + 13220496 = 8801^2 + 3636^2 .

It is a cyclic number.

It is not a de Polignac number, because 90678097 - 2⁷ = 90677969 is a prime.

It is not a weakly prime, because it can be changed into another prime (90678037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45339048 + 45339049.

It is an arithmetic number, because the mean of its divisors is an integer number (45339049).

Almost surely, 2^90678097 is an apocalyptic number.

It is an amenable number.

90678097 is a deficient number, since it is larger than the sum of its proper divisors (1).

90678097 is an equidigital number, since it uses as much as digits as its factorization.

90678097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 190512, while the sum is 46.

The square root of 90678097 is about 9522.5047650290. The cubic root of 90678097 is about 449.2631513136.

It can be divided in two parts, 906 and 78097, that added together give a triangular number (79003 = T₃₉₇).

The spelling of 90678097 in words is "ninety million, six hundred seventy-eight thousand, ninety-seven".