155147897 has 2 divisors, whose sum is σ = 155147898. Its totient is φ = 155147896.

The previous prime is 155147887. The next prime is 155147921. The reversal of 155147897 is 798741551.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78340201 + 76807696 = 8851^2 + 8764^2 .

It is a cyclic number.

It is not a de Polignac number, because 155147897 - 2²⁴ = 138370681 is a prime.

It is not a weakly prime, because it can be changed into another prime (155147807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77573948 + 77573949.

It is an arithmetic number, because the mean of its divisors is an integer number (77573949).

Almost surely, 2^155147897 is an apocalyptic number.

It is an amenable number.

155147897 is a deficient number, since it is larger than the sum of its proper divisors (1).

155147897 is an equidigital number, since it uses as much as digits as its factorization.

155147897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 352800, while the sum is 47.

The square root of 155147897 is about 12455.8378682448. The cubic root of 155147897 is about 537.3393319675.

It can be divided in two parts, 1551 and 47897, that multiplied together give a palindrome (74288247).

The spelling of 155147897 in words is "one hundred fifty-five million, one hundred forty-seven thousand, eight hundred ninety-seven".