155086997 has 8 divisors (see below), whose sum is σ = 168639744. Its totient is φ = 141766128.

The previous prime is 155086973. The next prime is 155087011. The reversal of 155086997 is 799680551.

It is a happy number.

155086997 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 155086997 - 2¹² = 155082901 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155086297) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56573 + ... + 59250.

It is an arithmetic number, because the mean of its divisors is an integer number (21079968).

Almost surely, 2^155086997 is an apocalyptic number.

It is an amenable number.

155086997 is a deficient number, since it is larger than the sum of its proper divisors (13552747).

155086997 is a wasteful number, since it uses less digits than its factorization.

155086997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115939.

The product of its (nonzero) digits is 680400, while the sum is 50.

The square root of 155086997 is about 12453.3929914702. The cubic root of 155086997 is about 537.2690157325.

The spelling of 155086997 in words is "one hundred fifty-five million, eighty-six thousand, nine hundred ninety-seven".