1870420073 has 2 divisors, whose sum is σ = 1870420074. Its totient is φ = 1870420072.

The previous prime is 1870420031. The next prime is 1870420081. The reversal of 1870420073 is 3700240781.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 947900944 + 922519129 = 30788^2 + 30373^2 .

It is a cyclic number.

It is not a de Polignac number, because 1870420073 - 2¹⁶ = 1870354537 is a prime.

It is not a weakly prime, because it can be changed into another prime (1870420373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 935210036 + 935210037.

It is an arithmetic number, because the mean of its divisors is an integer number (935210037).

Almost surely, 2^1870420073 is an apocalyptic number.

It is an amenable number.

1870420073 is a deficient number, since it is larger than the sum of its proper divisors (1).

1870420073 is an equidigital number, since it uses as much as digits as its factorization.

1870420073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9408, while the sum is 32.

The square root of 1870420073 is about 43248.3534137428. The cubic root of 1870420073 is about 1232.1012122480.

The spelling of 1870420073 in words is "one billion, eight hundred seventy million, four hundred twenty thousand, seventy-three".