90981151 has 2 divisors, whose sum is σ = 90981152. Its totient is φ = 90981150.

The previous prime is 90981119. The next prime is 90981157. The reversal of 90981151 is 15118909.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 90981151 - 2⁵ = 90981119 is a prime.

It is equal to p_5270659 and since 90981151 and 5270659 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90981157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45490575 + 45490576.

It is an arithmetic number, because the mean of its divisors is an integer number (45490576).

Almost surely, 2^90981151 is an apocalyptic number.

90981151 is a deficient number, since it is larger than the sum of its proper divisors (1).

90981151 is an equidigital number, since it uses as much as digits as its factorization.

90981151 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3240, while the sum is 34.

The square root of 90981151 is about 9538.4040069605. The cubic root of 90981151 is about 449.7630868160.

The spelling of 90981151 in words is "ninety million, nine hundred eighty-one thousand, one hundred fifty-one".