290109397 has 8 divisors (see below), whose sum is σ = 295774976. Its totient is φ = 284483232.

The previous prime is 290109389. The next prime is 290109497. The reversal of 290109397 is 793901092.

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 290109397 - 2³ = 290109389 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 (290109367) 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, 5233 + ... + 24649.

It is an arithmetic number, because the mean of its divisors is an integer number (36971872).

Almost surely, 2^290109397 is an apocalyptic number.

It is an amenable number.

290109397 is a deficient number, since it is larger than the sum of its proper divisors (5665579).

290109397 is a wasteful number, since it uses less digits than its factorization.

290109397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19707.

The product of its (nonzero) digits is 30618, while the sum is 40.

The square root of 290109397 is about 17032.5980695841. The cubic root of 290109397 is about 661.9938154118.

The spelling of 290109397 in words is "two hundred ninety million, one hundred nine thousand, three hundred ninety-seven".