153121739 has 2 divisors, whose sum is σ = 153121740. Its totient is φ = 153121738.

The previous prime is 153121721. The next prime is 153121747. The reversal of 153121739 is 937121351.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-153121739 is a prime.

It is not a weakly prime, because it can be changed into another prime (153121939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 76560869 + 76560870.

It is an arithmetic number, because the mean of its divisors is an integer number (76560870).

Almost surely, 2^153121739 is an apocalyptic number.

153121739 is a deficient number, since it is larger than the sum of its proper divisors (1).

153121739 is an equidigital number, since it uses as much as digits as its factorization.

153121739 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5670, while the sum is 32.

The square root of 153121739 is about 12374.2369057651. The cubic root of 153121739 is about 534.9899424551.

The spelling of 153121739 in words is "one hundred fifty-three million, one hundred twenty-one thousand, seven hundred thirty-nine".