155672047 has 2 divisors, whose sum is σ = 155672048. Its totient is φ = 155672046.

The previous prime is 155671991. The next prime is 155672057. The reversal of 155672047 is 740276551.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155672047 is a prime.

It is equal to p_8745247 and since 155672047 and 8745247 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 155671997 and 155672015.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155672057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77836023 + 77836024.

It is an arithmetic number, because the mean of its divisors is an integer number (77836024).

Almost surely, 2^155672047 is an apocalyptic number.

155672047 is a deficient number, since it is larger than the sum of its proper divisors (1).

155672047 is an equidigital number, since it uses as much as digits as its factorization.

155672047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 58800, while the sum is 37.

The square root of 155672047 is about 12476.8604624721. The cubic root of 155672047 is about 537.9437656291.

The spelling of 155672047 in words is "one hundred fifty-five million, six hundred seventy-two thousand, forty-seven".