161039698 has 8 divisors (see below), whose sum is σ = 252062208. Its totient is φ = 77018964.

The previous prime is 161039693. The next prime is 161039707. The reversal of 161039698 is 896930161.

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

It is not an unprimeable number, because it can be changed into a prime (161039693) 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, 1750386 + ... + 1750477.

It is an arithmetic number, because the mean of its divisors is an integer number (31507776).

Almost surely, 2^161039698 is an apocalyptic number.

161039698 is a deficient number, since it is larger than the sum of its proper divisors (91022510).

161039698 is a wasteful number, since it uses less digits than its factorization.

161039698 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3500888.

The product of its (nonzero) digits is 69984, while the sum is 43.

The square root of 161039698 is about 12690.1417643776. The cubic root of 161039698 is about 544.0568914874.

The spelling of 161039698 in words is "one hundred sixty-one million, thirty-nine thousand, six hundred ninety-eight".