1642927249 has 2 divisors, whose sum is σ = 1642927250. Its totient is φ = 1642927248.

The previous prime is 1642927217. The next prime is 1642927259. The reversal of 1642927249 is 9427292461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1384360849 + 258566400 = 37207^2 + 16080^2 .

It is a cyclic number.

It is not a de Polignac number, because 1642927249 - 2⁵ = 1642927217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1642927199 and 1642927208.

It is not a weakly prime, because it can be changed into another prime (1642927259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 821463624 + 821463625.

It is an arithmetic number, because the mean of its divisors is an integer number (821463625).

Almost surely, 2^1642927249 is an apocalyptic number.

It is an amenable number.

1642927249 is a deficient number, since it is larger than the sum of its proper divisors (1).

1642927249 is an equidigital number, since it uses as much as digits as its factorization.

1642927249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 435456, while the sum is 46.

The square root of 1642927249 is about 40533.0389805650. The cubic root of 1642927249 is about 1179.9749226213.

The spelling of 1642927249 in words is "one billion, six hundred forty-two million, nine hundred twenty-seven thousand, two hundred forty-nine".