1938257623 has 2 divisors, whose sum is σ = 1938257624. Its totient is φ = 1938257622.

The previous prime is 1938257591. The next prime is 1938257639. The reversal of 1938257623 is 3267528391.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1938257623 - 2⁵ = 1938257591 is a prime.

It is a super-2 number, since 2×1938257623² = 7513685226235220258, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1938257323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 969128811 + 969128812.

It is an arithmetic number, because the mean of its divisors is an integer number (969128812).

Almost surely, 2^1938257623 is an apocalyptic number.

1938257623 is a deficient number, since it is larger than the sum of its proper divisors (1).

1938257623 is an equidigital number, since it uses as much as digits as its factorization.

1938257623 is an evil number, because the sum of its binary digits is even.

The product of its digits is 544320, while the sum is 46.

The square root of 1938257623 is about 44025.6473319814. The cubic root of 1938257623 is about 1246.8202109187.

The spelling of 1938257623 in words is "one billion, nine hundred thirty-eight million, two hundred fifty-seven thousand, six hundred twenty-three".