155454947 has 2 divisors, whose sum is σ = 155454948. Its totient is φ = 155454946.

The previous prime is 155454869. The next prime is 155454977. The reversal of 155454947 is 749454551.

It is a strong prime.

It is an emirp because it is prime and its reverse (749454551) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 155454947 - 2¹⁸ = 155192803 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 155454898 and 155454907.

It is not a weakly prime, because it can be changed into another prime (155454977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77727473 + 77727474.

It is an arithmetic number, because the mean of its divisors is an integer number (77727474).

Almost surely, 2^155454947 is an apocalyptic number.

155454947 is a deficient number, since it is larger than the sum of its proper divisors (1).

155454947 is an equidigital number, since it uses as much as digits as its factorization.

155454947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 504000, while the sum is 44.

The square root of 155454947 is about 12468.1573217537. The cubic root of 155454947 is about 537.6935774365.

The spelling of 155454947 in words is "one hundred fifty-five million, four hundred fifty-four thousand, nine hundred forty-seven".