90134977 has 2 divisors, whose sum is σ = 90134978. Its totient is φ = 90134976.

The previous prime is 90134951. The next prime is 90135007. The reversal of 90134977 is 77943109.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47114496 + 43020481 = 6864^2 + 6559^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90134977 is a prime.

It is not a weakly prime, because it can be changed into another prime (90134377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45067488 + 45067489.

It is an arithmetic number, because the mean of its divisors is an integer number (45067489).

Almost surely, 2^90134977 is an apocalyptic number.

It is an amenable number.

90134977 is a deficient number, since it is larger than the sum of its proper divisors (1).

90134977 is an equidigital number, since it uses as much as digits as its factorization.

90134977 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 47628, while the sum is 40.

The square root of 90134977 is about 9493.9442277696. The cubic root of 90134977 is about 448.3643948144.

The spelling of 90134977 in words is "ninety million, one hundred thirty-four thousand, nine hundred seventy-seven".