1620737423 has 2 divisors, whose sum is σ = 1620737424. Its totient is φ = 1620737422.

The previous prime is 1620737387. The next prime is 1620737477. The reversal of 1620737423 is 3247370261.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1620737423 - 2¹⁰ = 1620736399 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1620731423) 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, 810368711 + 810368712.

It is an arithmetic number, because the mean of its divisors is an integer number (810368712).

Almost surely, 2^1620737423 is an apocalyptic number.

1620737423 is a deficient number, since it is larger than the sum of its proper divisors (1).

1620737423 is an equidigital number, since it uses as much as digits as its factorization.

1620737423 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 42336, while the sum is 35.

The square root of 1620737423 is about 40258.3832636136. The cubic root of 1620737423 is about 1174.6384698513.

The spelling of 1620737423 in words is "one billion, six hundred twenty million, seven hundred thirty-seven thousand, four hundred twenty-three".