155540947 has 2 divisors, whose sum is σ = 155540948. Its totient is φ = 155540946.

The previous prime is 155540941. The next prime is 155540953. The reversal of 155540947 is 749045551.

It is a balanced prime because it is at equal distance from previous prime (155540941) and next prime (155540953).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155540947 is a prime.

It is not a weakly prime, because it can be changed into another prime (155540941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77770473 + 77770474.

It is an arithmetic number, because the mean of its divisors is an integer number (77770474).

Almost surely, 2^155540947 is an apocalyptic number.

155540947 is a deficient number, since it is larger than the sum of its proper divisors (1).

155540947 is an equidigital number, since it uses as much as digits as its factorization.

155540947 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 126000, while the sum is 40.

The square root of 155540947 is about 12471.6056303910. The cubic root of 155540947 is about 537.7927125321.

The spelling of 155540947 in words is "one hundred fifty-five million, five hundred forty thousand, nine hundred forty-seven".