36609421 has 2 divisors, whose sum is σ = 36609422. Its totient is φ = 36609420.

The previous prime is 36609413. The next prime is 36609431. The reversal of 36609421 is 12490663.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35581225 + 1028196 = 5965^2 + 1014^2 .

It is an emirp because it is prime and its reverse (12490663) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 36609421 - 2³ = 36609413 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (36609431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18304710 + 18304711.

It is an arithmetic number, because the mean of its divisors is an integer number (18304711).

Almost surely, 2^36609421 is an apocalyptic number.

It is an amenable number.

36609421 is a deficient number, since it is larger than the sum of its proper divisors (1).

36609421 is an equidigital number, since it uses as much as digits as its factorization.

36609421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 36609421 is about 6050.5719564352. The cubic root of 36609421 is about 332.0455162108.

The spelling of 36609421 in words is "thirty-six million, six hundred nine thousand, four hundred twenty-one".