1354703061721 has 2 divisors, whose sum is σ = 1354703061722. Its totient is φ = 1354703061720.

The previous prime is 1354703061713. The next prime is 1354703061727. The reversal of 1354703061721 is 1271603074531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1269576830025 + 85126231696 = 1126755^2 + 291764^2 .

It is a cyclic number.

It is not a de Polignac number, because 1354703061721 - 2³ = 1354703061713 is a prime.

It is not a weakly prime, because it can be changed into another prime (1354703061727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 677351530860 + 677351530861.

It is an arithmetic number, because the mean of its divisors is an integer number (677351530861).

Almost surely, 2^{1354703061721} is an apocalyptic number.

It is an amenable number.

1354703061721 is a deficient number, since it is larger than the sum of its proper divisors (1).

1354703061721 is an equidigital number, since it uses as much as digits as its factorization.

1354703061721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 105840, while the sum is 40.

The spelling of 1354703061721 in words is "one trillion, three hundred fifty-four billion, seven hundred three million, sixty-one thousand, seven hundred twenty-one".