1904236157 has 2 divisors, whose sum is σ = 1904236158. Its totient is φ = 1904236156.

The previous prime is 1904236153. The next prime is 1904236211. The reversal of 1904236157 is 7516324091.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 997864921 + 906371236 = 31589^2 + 30106^2 .

It is a cyclic number.

It is not a de Polignac number, because 1904236157 - 2² = 1904236153 is a prime.

It is a super-2 number, since 2×1904236157² = 7252230683252257298, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1904236157.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1904236153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 952118078 + 952118079.

It is an arithmetic number, because the mean of its divisors is an integer number (952118079).

Almost surely, 2^1904236157 is an apocalyptic number.

It is an amenable number.

1904236157 is a deficient number, since it is larger than the sum of its proper divisors (1).

1904236157 is an equidigital number, since it uses as much as digits as its factorization.

1904236157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 1904236157 is about 43637.5544342256. The cubic root of 1904236157 is about 1239.4821278760.

The spelling of 1904236157 in words is "one billion, nine hundred four million, two hundred thirty-six thousand, one hundred fifty-seven".