147781897 has 2 divisors, whose sum is σ = 147781898. Its totient is φ = 147781896.

The previous prime is 147781889. The next prime is 147781951. The reversal of 147781897 is 798187741.

147781897 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 102030201 + 45751696 = 10101^2 + 6764^2 .

It is a cyclic number.

It is not a de Polignac number, because 147781897 - 2³ = 147781889 is a prime.

It is not a weakly prime, because it can be changed into another prime (147781847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 73890948 + 73890949.

It is an arithmetic number, because the mean of its divisors is an integer number (73890949).

Almost surely, 2^147781897 is an apocalyptic number.

It is an amenable number.

147781897 is a deficient number, since it is larger than the sum of its proper divisors (1).

147781897 is an equidigital number, since it uses as much as digits as its factorization.

147781897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 790272, while the sum is 52.

The square root of 147781897 is about 12156.5577775948. The cubic root of 147781897 is about 528.6972835759.

The spelling of 147781897 in words is "one hundred forty-seven million, seven hundred eighty-one thousand, eight hundred ninety-seven".