91398101 has 2 divisors, whose sum is σ = 91398102. Its totient is φ = 91398100.

The previous prime is 91398071. The next prime is 91398119. The reversal of 91398101 is 10189319.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52635025 + 38763076 = 7255^2 + 6226^2 .

It is a cyclic number.

It is not a de Polignac number, because 91398101 - 2²² = 87203797 is a prime.

It is a super-2 number, since 2×91398101² = 16707225732812402, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91398121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45699050 + 45699051.

It is an arithmetic number, because the mean of its divisors is an integer number (45699051).

Almost surely, 2^91398101 is an apocalyptic number.

It is an amenable number.

91398101 is a deficient number, since it is larger than the sum of its proper divisors (1).

91398101 is an equidigital number, since it uses as much as digits as its factorization.

91398101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 32.

The square root of 91398101 is about 9560.2354050515. The cubic root of 91398101 is about 450.4491006191.

The spelling of 91398101 in words is "ninety-one million, three hundred ninety-eight thousand, one hundred one".