1890960397 has 2 divisors, whose sum is σ = 1890960398. Its totient is φ = 1890960396.

The previous prime is 1890960367. The next prime is 1890960499. The reversal of 1890960397 is 7930690981.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1830213961 + 60746436 = 42781^2 + 7794^2 .

It is an emirp because it is prime and its reverse (7930690981) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1890960397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1890960307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 945480198 + 945480199.

It is an arithmetic number, because the mean of its divisors is an integer number (945480199).

Almost surely, 2^1890960397 is an apocalyptic number.

It is an amenable number.

1890960397 is a deficient number, since it is larger than the sum of its proper divisors (1).

1890960397 is an equidigital number, since it uses as much as digits as its factorization.

1890960397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 734832, while the sum is 52.

The square root of 1890960397 is about 43485.1744506102. The cubic root of 1890960397 is about 1236.5949761754.

The spelling of 1890960397 in words is "one billion, eight hundred ninety million, nine hundred sixty thousand, three hundred ninety-seven".