90761389 has 2 divisors, whose sum is σ = 90761390. Its totient is φ = 90761388.

The previous prime is 90761369. The next prime is 90761401. The reversal of 90761389 is 98316709.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 85877289 + 4884100 = 9267^2 + 2210^2 .

It is a cyclic number.

It is not a de Polignac number, because 90761389 - 2⁹ = 90760877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90761369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45380694 + 45380695.

It is an arithmetic number, because the mean of its divisors is an integer number (45380695).

Almost surely, 2^90761389 is an apocalyptic number.

It is an amenable number.

90761389 is a deficient number, since it is larger than the sum of its proper divisors (1).

90761389 is an equidigital number, since it uses as much as digits as its factorization.

90761389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81648, while the sum is 43.

The square root of 90761389 is about 9526.8771903494. The cubic root of 90761389 is about 449.4006655025.

The spelling of 90761389 in words is "ninety million, seven hundred sixty-one thousand, three hundred eighty-nine".