73737143531 has 2 divisors, whose sum is σ = 73737143532. Its totient is φ = 73737143530.

The previous prime is 73737143443. The next prime is 73737143539. The reversal of 73737143531 is 13534173737.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 73737143531 - 2¹⁴ = 73737127147 is a prime.

It is a super-2 number, since 2×73737143531² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (73737143539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36868571765 + 36868571766.

It is an arithmetic number, because the mean of its divisors is an integer number (36868571766).

Almost surely, 2^73737143531 is an apocalyptic number.

73737143531 is a deficient number, since it is larger than the sum of its proper divisors (1).

73737143531 is an equidigital number, since it uses as much as digits as its factorization.

73737143531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 555660, while the sum is 44.

The spelling of 73737143531 in words is "seventy-three billion, seven hundred thirty-seven million, one hundred forty-three thousand, five hundred thirty-one".