155364779 has 2 divisors, whose sum is σ = 155364780. Its totient is φ = 155364778.

The previous prime is 155364763. The next prime is 155364791. The reversal of 155364779 is 977463551.

It is a happy number.

155364779 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 is a cyclic number.

It is not a de Polignac number, because 155364779 - 2⁴ = 155364763 is a prime.

It is equal to p_8728895 and since 155364779 and 8728895 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (155364709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77682389 + 77682390.

It is an arithmetic number, because the mean of its divisors is an integer number (77682390).

Almost surely, 2^155364779 is an apocalyptic number.

155364779 is a deficient number, since it is larger than the sum of its proper divisors (1).

155364779 is an equidigital number, since it uses as much as digits as its factorization.

155364779 is an evil number, because the sum of its binary digits is even.

The product of its digits is 793800, while the sum is 47.

The square root of 155364779 is about 12464.5408659926. The cubic root of 155364779 is about 537.5895984762.

The spelling of 155364779 in words is "one hundred fifty-five million, three hundred sixty-four thousand, seven hundred seventy-nine".