155826397 has 4 divisors (see below), whose sum is σ = 155918560. Its totient is φ = 155734236.

The previous prime is 155826383. The next prime is 155826401. The reversal of 155826397 is 793628551.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 793628551 = 31 ⋅25600921.

It is a cyclic number.

It is not a de Polignac number, because 155826397 - 2¹⁵ = 155793629 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 (155826317) 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, 43497 + ... + 46942.

It is an arithmetic number, because the mean of its divisors is an integer number (38979640).

Almost surely, 2^155826397 is an apocalyptic number.

It is an amenable number.

155826397 is a deficient number, since it is larger than the sum of its proper divisors (92163).

155826397 is an equidigital number, since it uses as much as digits as its factorization.

155826397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92162.

The product of its digits is 453600, while the sum is 46.

The square root of 155826397 is about 12483.0443802784. The cubic root of 155826397 is about 538.1214986577.

The spelling of 155826397 in words is "one hundred fifty-five million, eight hundred twenty-six thousand, three hundred ninety-seven".