1620742327 has 2 divisors, whose sum is σ = 1620742328. Its totient is φ = 1620742326.

The previous prime is 1620742301. The next prime is 1620742393. The reversal of 1620742327 is 7232470261.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1620742327 - 2²³ = 1612353719 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1620742292 and 1620742301.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1620742727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 810371163 + 810371164.

It is an arithmetic number, because the mean of its divisors is an integer number (810371164).

Almost surely, 2^1620742327 is an apocalyptic number.

1620742327 is a deficient number, since it is larger than the sum of its proper divisors (1).

1620742327 is an equidigital number, since it uses as much as digits as its factorization.

1620742327 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28224, while the sum is 34.

The square root of 1620742327 is about 40258.4441701365. Note that the first 3 decimals coincide. The cubic root of 1620742327 is about 1174.6396545839.

The spelling of 1620742327 in words is "one billion, six hundred twenty million, seven hundred forty-two thousand, three hundred twenty-seven".