36172003421 has 2 divisors, whose sum is σ = 36172003422. Its totient is φ = 36172003420.

The previous prime is 36172003411. The next prime is 36172003489. The reversal of 36172003421 is 12430027163.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35997472900 + 174530521 = 189730^2 + 13211^2 .

It is a cyclic number.

It is not a de Polignac number, because 36172003421 - 2³⁴ = 18992134237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (36172003411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18086001710 + 18086001711.

It is an arithmetic number, because the mean of its divisors is an integer number (18086001711).

Almost surely, 2^36172003421 is an apocalyptic number.

It is an amenable number.

36172003421 is a deficient number, since it is larger than the sum of its proper divisors (1).

36172003421 is an equidigital number, since it uses as much as digits as its factorization.

36172003421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 29.

The spelling of 36172003421 in words is "thirty-six billion, one hundred seventy-two million, three thousand, four hundred twenty-one".