1954026197 has 2 divisors, whose sum is σ = 1954026198. Its totient is φ = 1954026196.

The previous prime is 1954026181. The next prime is 1954026209. The reversal of 1954026197 is 7916204591.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1654943761 + 299082436 = 40681^2 + 17294^2 .

It is a cyclic number.

It is not a de Polignac number, because 1954026197 - 2⁴ = 1954026181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1954026097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 977013098 + 977013099.

It is an arithmetic number, because the mean of its divisors is an integer number (977013099).

Almost surely, 2^1954026197 is an apocalyptic number.

It is an amenable number.

1954026197 is a deficient number, since it is larger than the sum of its proper divisors (1).

1954026197 is an equidigital number, since it uses as much as digits as its factorization.

1954026197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 136080, while the sum is 44.

The square root of 1954026197 is about 44204.3685284611. The cubic root of 1954026197 is about 1250.1922257979.

The spelling of 1954026197 in words is "one billion, nine hundred fifty-four million, twenty-six thousand, one hundred ninety-seven".