153893197949 has 2 divisors, whose sum is σ = 153893197950. Its totient is φ = 153893197948.

The previous prime is 153893197883. The next prime is 153893197963. The reversal of 153893197949 is 949791398351.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 135858588100 + 18034609849 = 368590^2 + 134293^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-153893197949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (153893197999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 76946598974 + 76946598975.

It is an arithmetic number, because the mean of its divisors is an integer number (76946598975).

Almost surely, 2^153893197949 is an apocalyptic number.

It is an amenable number.

153893197949 is a deficient number, since it is larger than the sum of its proper divisors (1).

153893197949 is an equidigital number, since it uses as much as digits as its factorization.

153893197949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 66134880, while the sum is 68.

The spelling of 153893197949 in words is "one hundred fifty-three billion, eight hundred ninety-three million, one hundred ninety-seven thousand, nine hundred forty-nine".