155077969 has 2 divisors, whose sum is σ = 155077970. Its totient is φ = 155077968.

The previous prime is 155077939. The next prime is 155077997. The reversal of 155077969 is 969770551.

155077969 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 150185025 + 4892944 = 12255^2 + 2212^2 .

It is a cyclic number.

It is not a de Polignac number, because 155077969 - 2¹³ = 155069777 is a prime.

It is a super-2 number, since 2×155077969² = 48098352938329922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (155077919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77538984 + 77538985.

It is an arithmetic number, because the mean of its divisors is an integer number (77538985).

Almost surely, 2^155077969 is an apocalyptic number.

It is an amenable number.

155077969 is a deficient number, since it is larger than the sum of its proper divisors (1).

155077969 is an equidigital number, since it uses as much as digits as its factorization.

155077969 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 595350, while the sum is 49.

The square root of 155077969 is about 12453.0305146980. The cubic root of 155077969 is about 537.2585902748.

The spelling of 155077969 in words is "one hundred fifty-five million, seventy-seven thousand, nine hundred sixty-nine".