36439691 has 2 divisors, whose sum is σ = 36439692. Its totient is φ = 36439690.

The previous prime is 36439661. The next prime is 36439703. The reversal of 36439691 is 19693463.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 36439691 - 2¹⁴ = 36423307 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (36439621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18219845 + 18219846.

It is an arithmetic number, because the mean of its divisors is an integer number (18219846).

Almost surely, 2^36439691 is an apocalyptic number.

36439691 is a deficient number, since it is larger than the sum of its proper divisors (1).

36439691 is an equidigital number, since it uses as much as digits as its factorization.

36439691 is an evil number, because the sum of its binary digits is even.

The product of its digits is 104976, while the sum is 41.

The square root of 36439691 is about 6036.5297149935. The cubic root of 36439691 is about 331.5315737569.

The spelling of 36439691 in words is "thirty-six million, four hundred thirty-nine thousand, six hundred ninety-one".