161198290 has 16 divisors (see below), whose sum is σ = 316535040. Its totient is φ = 58617520.

The previous prime is 161198287. The next prime is 161198293. The reversal of 161198290 is 92891161.

161198290 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (161198287) and next prime (161198293).

It is not an unprimeable number, because it can be changed into a prime (161198293) 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, 732610 + ... + 732829.

It is an arithmetic number, because the mean of its divisors is an integer number (19783440).

Almost surely, 2^161198290 is an apocalyptic number.

161198290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161198290 is a deficient number, since it is larger than the sum of its proper divisors (155336750).

161198290 is a wasteful number, since it uses less digits than its factorization.

161198290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1465457.

The product of its (nonzero) digits is 7776, while the sum is 37.

The square root of 161198290 is about 12696.3888566789. The cubic root of 161198290 is about 544.2354287533.

The spelling of 161198290 in words is "one hundred sixty-one million, one hundred ninety-eight thousand, two hundred ninety".