1947790253 has 2 divisors, whose sum is σ = 1947790254. Its totient is φ = 1947790252.

The previous prime is 1947790183. The next prime is 1947790277. The reversal of 1947790253 is 3520977491.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 999950884 + 947839369 = 31622^2 + 30787^2 .

It is a cyclic number.

It is not a de Polignac number, because 1947790253 - 2¹² = 1947786157 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1947790198 and 1947790207.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1947790553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 973895126 + 973895127.

It is an arithmetic number, because the mean of its divisors is an integer number (973895127).

Almost surely, 2^1947790253 is an apocalyptic number.

It is an amenable number.

1947790253 is a deficient number, since it is larger than the sum of its proper divisors (1).

1947790253 is an equidigital number, since it uses as much as digits as its factorization.

1947790253 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 476280, while the sum is 47.

The square root of 1947790253 is about 44133.7767815083. The cubic root of 1947790253 is about 1248.8608828851.

The spelling of 1947790253 in words is "one billion, nine hundred forty-seven million, seven hundred ninety thousand, two hundred fifty-three".