1953261091 has 2 divisors, whose sum is σ = 1953261092. Its totient is φ = 1953261090.

The previous prime is 1953261083. The next prime is 1953261097. The reversal of 1953261091 is 1901623591.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1953261091 - 2³ = 1953261083 is a prime.

It is a super-2 number, since 2×1953261091² = 7630457779229020562, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1953261091.

It is not a weakly prime, because it can be changed into another prime (1953261097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 976630545 + 976630546.

It is an arithmetic number, because the mean of its divisors is an integer number (976630546).

Almost surely, 2^1953261091 is an apocalyptic number.

1953261091 is a deficient number, since it is larger than the sum of its proper divisors (1).

1953261091 is an equidigital number, since it uses as much as digits as its factorization.

1953261091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14580, while the sum is 37.

The square root of 1953261091 is about 44195.7134912426. The cubic root of 1953261091 is about 1250.0290320724.

The spelling of 1953261091 in words is "one billion, nine hundred fifty-three million, two hundred sixty-one thousand, ninety-one".