1901923 has 2 divisors, whose sum is σ = 1901924. Its totient is φ = 1901922.

The previous prime is 1901917. The next prime is 1901947. The reversal of 1901923 is 3291091.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1901923 - 2⁵ = 1901891 is a prime.

It is a super-2 number, since 2×1901923² = 7234622195858, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1901993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 950961 + 950962.

It is an arithmetic number, because the mean of its divisors is an integer number (950962).

2^1901923 is an apocalyptic number.

1901923 is a deficient number, since it is larger than the sum of its proper divisors (1).

1901923 is an equidigital number, since it uses as much as digits as its factorization.

1901923 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 486, while the sum is 25.

The square root of 1901923 is about 1379.1022442154. The cubic root of 1901923 is about 123.8980040557.

The spelling of 1901923 in words is "one million, nine hundred one thousand, nine hundred twenty-three".