91402393 has 2 divisors, whose sum is σ = 91402394. Its totient is φ = 91402392.

The previous prime is 91402379. The next prime is 91402429. The reversal of 91402393 is 39320419.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 88416409 + 2985984 = 9403^2 + 1728^2 .

It is a cyclic number.

It is not a de Polignac number, because 91402393 - 2²⁵ = 57847961 is a prime.

It is a super-2 number, since 2×91402393² = 16708794892252898, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (91402313) 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, 45701196 + 45701197.

It is an arithmetic number, because the mean of its divisors is an integer number (45701197).

Almost surely, 2^91402393 is an apocalyptic number.

It is an amenable number.

91402393 is a deficient number, since it is larger than the sum of its proper divisors (1).

91402393 is an equidigital number, since it uses as much as digits as its factorization.

91402393 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5832, while the sum is 31.

The square root of 91402393 is about 9560.4598738764. The cubic root of 91402393 is about 450.4561514485.

The spelling of 91402393 in words is "ninety-one million, four hundred two thousand, three hundred ninety-three".