1436790221 has 2 divisors, whose sum is σ = 1436790222. Its totient is φ = 1436790220.

The previous prime is 1436790193. The next prime is 1436790247. The reversal of 1436790221 is 1220976341.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1186802500 + 249987721 = 34450^2 + 15811^2 .

It is a cyclic number.

It is not a de Polignac number, because 1436790221 - 2¹⁰ = 1436789197 is a prime.

It is a super-2 number, since 2×1436790221² = 4128732278322457682, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1436790521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 718395110 + 718395111.

It is an arithmetic number, because the mean of its divisors is an integer number (718395111).

Almost surely, 2^1436790221 is an apocalyptic number.

It is an amenable number.

1436790221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1436790221 is an equidigital number, since it uses as much as digits as its factorization.

1436790221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 1436790221 is about 37905.0157762795. The cubic root of 1436790221 is about 1128.4035777892.

The spelling of 1436790221 in words is "one billion, four hundred thirty-six million, seven hundred ninety thousand, two hundred twenty-one".