35719147921 has 2 divisors, whose sum is σ = 35719147922. Its totient is φ = 35719147920.

The previous prime is 35719147903. The next prime is 35719147943. The reversal of 35719147921 is 12974191753.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34328678400 + 1390469521 = 185280^2 + 37289^2 .

It is an emirp because it is prime and its reverse (12974191753) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-35719147921 is a prime.

It is not a weakly prime, because it can be changed into another prime (35719147901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17859573960 + 17859573961.

It is an arithmetic number, because the mean of its divisors is an integer number (17859573961).

Almost surely, 2^35719147921 is an apocalyptic number.

It is an amenable number.

35719147921 is a deficient number, since it is larger than the sum of its proper divisors (1).

35719147921 is an equidigital number, since it uses as much as digits as its factorization.

35719147921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 476280, while the sum is 49.

The spelling of 35719147921 in words is "thirty-five billion, seven hundred nineteen million, one hundred forty-seven thousand, nine hundred twenty-one".