1918137097 has 2 divisors, whose sum is σ = 1918137098. Its totient is φ = 1918137096.

The previous prime is 1918137083. The next prime is 1918137101. The reversal of 1918137097 is 7907318191.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1302055056 + 616082041 = 36084^2 + 24821^2 .

It is a cyclic number.

It is not a de Polignac number, because 1918137097 - 2¹¹ = 1918135049 is a prime.

It is not a weakly prime, because it can be changed into another prime (1918137197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 959068548 + 959068549.

It is an arithmetic number, because the mean of its divisors is an integer number (959068549).

Almost surely, 2^1918137097 is an apocalyptic number.

It is an amenable number.

1918137097 is a deficient number, since it is larger than the sum of its proper divisors (1).

1918137097 is an equidigital number, since it uses as much as digits as its factorization.

1918137097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 95256, while the sum is 46.

The square root of 1918137097 is about 43796.5420666975. The cubic root of 1918137097 is about 1242.4908950289.

The spelling of 1918137097 in words is "one billion, nine hundred eighteen million, one hundred thirty-seven thousand, ninety-seven".