1953121477 has 2 divisors, whose sum is σ = 1953121478. Its totient is φ = 1953121476.

The previous prime is 1953121459. The next prime is 1953121501. The reversal of 1953121477 is 7741213591.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1033879716 + 919241761 = 32154^2 + 30319^2 .

It is a cyclic number.

It is not a de Polignac number, because 1953121477 - 2¹¹ = 1953119429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1953122477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 976560738 + 976560739.

It is an arithmetic number, because the mean of its divisors is an integer number (976560739).

Almost surely, 2^1953121477 is an apocalyptic number.

It is an amenable number.

1953121477 is a deficient number, since it is larger than the sum of its proper divisors (1).

1953121477 is an equidigital number, since it uses as much as digits as its factorization.

1953121477 is an evil number, because the sum of its binary digits is even.

The product of its digits is 52920, while the sum is 40.

The square root of 1953121477 is about 44194.1339659462. The cubic root of 1953121477 is about 1249.9992484262. Note that the first 3 decimals are identical.

The spelling of 1953121477 in words is "one billion, nine hundred fifty-three million, one hundred twenty-one thousand, four hundred seventy-seven".