36415991 has 2 divisors, whose sum is σ = 36415992. Its totient is φ = 36415990.

The previous prime is 36415961. The next prime is 36416053. The reversal of 36415991 is 19951463.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 36415991 - 2⁶ = 36415927 is a prime.

It is a super-2 number, since 2×36415991² = 2652248801024162, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (36415961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18207995 + 18207996.

It is an arithmetic number, because the mean of its divisors is an integer number (18207996).

Almost surely, 2^36415991 is an apocalyptic number.

36415991 is a deficient number, since it is larger than the sum of its proper divisors (1).

36415991 is an equidigital number, since it uses as much as digits as its factorization.

36415991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 29160, while the sum is 38.

The square root of 36415991 is about 6034.5663473028. The cubic root of 36415991 is about 331.4596832612.

The spelling of 36415991 in words is "thirty-six million, four hundred fifteen thousand, nine hundred ninety-one".