1653922381 has 2 divisors, whose sum is σ = 1653922382. Its totient is φ = 1653922380.

The previous prime is 1653922357. The next prime is 1653922429. The reversal of 1653922381 is 1832293561.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1565468356 + 88454025 = 39566^2 + 9405^2 .

It is a cyclic number.

It is not a de Polignac number, because 1653922381 - 2⁵ = 1653922349 is a prime.

It is a super-2 number, since 2×1653922381² = 5470918484745418322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1653922331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 826961190 + 826961191.

It is an arithmetic number, because the mean of its divisors is an integer number (826961191).

Almost surely, 2^1653922381 is an apocalyptic number.

It is an amenable number.

1653922381 is a deficient number, since it is larger than the sum of its proper divisors (1).

1653922381 is an equidigital number, since it uses as much as digits as its factorization.

1653922381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 77760, while the sum is 40.

The square root of 1653922381 is about 40668.4445362741. Note that the first 3 decimals coincide. The cubic root of 1653922381 is about 1182.6013616596.

The spelling of 1653922381 in words is "one billion, six hundred fifty-three million, nine hundred twenty-two thousand, three hundred eighty-one".