1356921983 has 2 divisors, whose sum is σ = 1356921984. Its totient is φ = 1356921982.

The previous prime is 1356921959. The next prime is 1356922009. The reversal of 1356921983 is 3891296531.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1356921983 - 2²⁸ = 1088486527 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1356921583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 678460991 + 678460992.

It is an arithmetic number, because the mean of its divisors is an integer number (678460992).

Almost surely, 2^1356921983 is an apocalyptic number.

1356921983 is a deficient number, since it is larger than the sum of its proper divisors (1).

1356921983 is an equidigital number, since it uses as much as digits as its factorization.

1356921983 is an evil number, because the sum of its binary digits is even.

The product of its digits is 349920, while the sum is 47.

The square root of 1356921983 is about 36836.4219625088. The cubic root of 1356921983 is about 1107.0951786962.

The spelling of 1356921983 in words is "one billion, three hundred fifty-six million, nine hundred twenty-one thousand, nine hundred eighty-three".