1953283921 has 2 divisors, whose sum is σ = 1953283922. Its totient is φ = 1953283920.

The previous prime is 1953283879. The next prime is 1953283933. The reversal of 1953283921 is 1293823591.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1944810000 + 8473921 = 44100^2 + 2911^2 .

It is an emirp because it is prime and its reverse (1293823591) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1953283921 - 2¹³ = 1953275729 is a prime.

It is not a weakly prime, because it can be changed into another prime (1953283121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 976641960 + 976641961.

It is an arithmetic number, because the mean of its divisors is an integer number (976641961).

Almost surely, 2^1953283921 is an apocalyptic number.

It is an amenable number.

1953283921 is a deficient number, since it is larger than the sum of its proper divisors (1).

1953283921 is an equidigital number, since it uses as much as digits as its factorization.

1953283921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 116640, while the sum is 43.

The square root of 1953283921 is about 44195.9717734546. The cubic root of 1953283921 is about 1250.0339022272.

The spelling of 1953283921 in words is "one billion, nine hundred fifty-three million, two hundred eighty-three thousand, nine hundred twenty-one".