1904129939 has 2 divisors, whose sum is σ = 1904129940. Its totient is φ = 1904129938.

The previous prime is 1904129893. The next prime is 1904129963. The reversal of 1904129939 is 9399214091.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1904129939 - 2¹² = 1904125843 is a prime.

It is a super-2 number, since 2×1904129939² = 7251421649192287442, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1904129893 and 1904129902.

It is not a weakly prime, because it can be changed into another prime (1904129989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 952064969 + 952064970.

It is an arithmetic number, because the mean of its divisors is an integer number (952064970).

Almost surely, 2^1904129939 is an apocalyptic number.

1904129939 is a deficient number, since it is larger than the sum of its proper divisors (1).

1904129939 is an equidigital number, since it uses as much as digits as its factorization.

1904129939 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 157464, while the sum is 47.

The square root of 1904129939 is about 43636.3373692156. The cubic root of 1904129939 is about 1239.4590814066.

The spelling of 1904129939 in words is "one billion, nine hundred four million, one hundred twenty-nine thousand, nine hundred thirty-nine".