91438007 has 2 divisors, whose sum is σ = 91438008. Its totient is φ = 91438006.

The previous prime is 91437979. The next prime is 91438021. The reversal of 91438007 is 70083419.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 91438007 - 2⁸ = 91437751 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91438037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45719003 + 45719004.

It is an arithmetic number, because the mean of its divisors is an integer number (45719004).

Almost surely, 2^91438007 is an apocalyptic number.

91438007 is a deficient number, since it is larger than the sum of its proper divisors (1).

91438007 is an equidigital number, since it uses as much as digits as its factorization.

91438007 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 91438007 is about 9562.3222597861. The cubic root of 91438007 is about 450.5146490498.

The spelling of 91438007 in words is "ninety-one million, four hundred thirty-eight thousand, seven".