90772147 has 2 divisors, whose sum is σ = 90772148. Its totient is φ = 90772146.

The previous prime is 90772103. The next prime is 90772189. The reversal of 90772147 is 74127709.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 90772147 - 2¹⁵ = 90739379 is a prime.

It is not a weakly prime, because it can be changed into another prime (90775147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45386073 + 45386074.

It is an arithmetic number, because the mean of its divisors is an integer number (45386074).

Almost surely, 2^90772147 is an apocalyptic number.

90772147 is a deficient number, since it is larger than the sum of its proper divisors (1).

90772147 is an equidigital number, since it uses as much as digits as its factorization.

90772147 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24696, while the sum is 37.

The square root of 90772147 is about 9527.4417867547. The cubic root of 90772147 is about 449.4184207081.

The spelling of 90772147 in words is "ninety million, seven hundred seventy-two thousand, one hundred forty-seven".