147737621887381 has 2 divisors, whose sum is σ = 147737621887382. Its totient is φ = 147737621887380.

The previous prime is 147737621887357. The next prime is 147737621887421. The reversal of 147737621887381 is 183788126737741.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 108704603822500 + 39033018064881 = 10426150^2 + 6247641^2 .

It is an emirp because it is prime and its reverse (183788126737741) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-147737621887381 is a prime.

It is a super-2 number, since 2×147737621887381² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (147737621887351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 73868810943690 + 73868810943691.

It is an arithmetic number, because the mean of its divisors is an integer number (73868810943691).

Almost surely, 2^{147737621887381} is an apocalyptic number.

It is an amenable number.

147737621887381 is a deficient number, since it is larger than the sum of its proper divisors (1).

147737621887381 is an equidigital number, since it uses as much as digits as its factorization.

147737621887381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 531062784, while the sum is 73.

The spelling of 147737621887381 in words is "one hundred forty-seven trillion, seven hundred thirty-seven billion, six hundred twenty-one million, eight hundred eighty-seven thousand, three hundred eighty-one".