156998 has 8 divisors (see below), whose sum is σ = 245808. Its totient is φ = 75064.

The previous prime is 156979. The next prime is 157007. The reversal of 156998 is 899651.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1661 + ... + 1752.

It is an arithmetic number, because the mean of its divisors is an integer number (30726).

2¹⁵⁶⁹⁹⁸ is an apocalyptic number.

156998 is a deficient number, since it is larger than the sum of its proper divisors (88810).

156998 is a wasteful number, since it uses less digits than its factorization.

156998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3438.

The product of its digits is 19440, while the sum is 38.

The square root of 156998 is about 396.2297313428. The cubic root of 156998 is about 53.9466780462.

The spelling of 156998 in words is "one hundred fifty-six thousand, nine hundred ninety-eight".