34509991 has 2 divisors, whose sum is σ = 34509992. Its totient is φ = 34509990.

The previous prime is 34509977. The next prime is 34509997. The reversal of 34509991 is 19990543.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 34509991 - 2¹³ = 34501799 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (34509997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17254995 + 17254996.

It is an arithmetic number, because the mean of its divisors is an integer number (17254996).

Almost surely, 2^34509991 is an apocalyptic number.

34509991 is a deficient number, since it is larger than the sum of its proper divisors (1).

34509991 is an equidigital number, since it uses as much as digits as its factorization.

34509991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 43740, while the sum is 40.

The square root of 34509991 is about 5874.5204910699. The cubic root of 34509991 is about 325.5729255207.

The spelling of 34509991 in words is "thirty-four million, five hundred nine thousand, nine hundred ninety-one".