1897915141 has 2 divisors, whose sum is σ = 1897915142. Its totient is φ = 1897915140.

The previous prime is 1897915099. The next prime is 1897915147. The reversal of 1897915141 is 1415197981.

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., 1852958116 + 44957025 = 43046^2 + 6705^2 .

It is a cyclic number.

It is not a de Polignac number, because 1897915141 - 2¹³ = 1897906949 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1897915091 and 1897915100.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1897915147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 948957570 + 948957571.

It is an arithmetic number, because the mean of its divisors is an integer number (948957571).

Almost surely, 2^1897915141 is an apocalyptic number.

It is an amenable number.

1897915141 is a deficient number, since it is larger than the sum of its proper divisors (1).

1897915141 is an equidigital number, since it uses as much as digits as its factorization.

1897915141 is an evil number, because the sum of its binary digits is even.

The product of its digits is 90720, while the sum is 46.

The square root of 1897915141 is about 43565.0678984895. The cubic root of 1897915141 is about 1238.1091414049.

The spelling of 1897915141 in words is "one billion, eight hundred ninety-seven million, nine hundred fifteen thousand, one hundred forty-one".