36131989 has 2 divisors, whose sum is σ = 36131990. Its totient is φ = 36131988.

The previous prime is 36131983. The next prime is 36132037. The reversal of 36131989 is 98913163.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26780625 + 9351364 = 5175^2 + 3058^2 .

It is an emirp because it is prime and its reverse (98913163) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 36131989 - 2²¹ = 34034837 is a prime.

It is a super-2 number, since 2×36131989² = 2611041258192242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (36131983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18065994 + 18065995.

It is an arithmetic number, because the mean of its divisors is an integer number (18065995).

Almost surely, 2^36131989 is an apocalyptic number.

It is an amenable number.

36131989 is a deficient number, since it is larger than the sum of its proper divisors (1).

36131989 is an equidigital number, since it uses as much as digits as its factorization.

36131989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34992, while the sum is 40.

The square root of 36131989 is about 6010.9890201197. The cubic root of 36131989 is about 330.5957679781.

The spelling of 36131989 in words is "thirty-six million, one hundred thirty-one thousand, nine hundred eighty-nine".