155403847 has 4 divisors (see below), whose sum is σ = 162160560. Its totient is φ = 148647136.

The previous prime is 155403841. The next prime is 155403881. The reversal of 155403847 is 748304551.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 155403847 - 2¹⁵ = 155371079 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155403841) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3378322 + ... + 3378367.

It is an arithmetic number, because the mean of its divisors is an integer number (40540140).

Almost surely, 2^155403847 is an apocalyptic number.

155403847 is a deficient number, since it is larger than the sum of its proper divisors (6756713).

155403847 is an equidigital number, since it uses as much as digits as its factorization.

155403847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6756712.

The product of its (nonzero) digits is 67200, while the sum is 37.

The square root of 155403847 is about 12466.1079331121. The cubic root of 155403847 is about 537.6346554284.

The spelling of 155403847 in words is "one hundred fifty-five million, four hundred three thousand, eight hundred forty-seven".