201309697 has 4 divisors (see below), whose sum is σ = 201408516. Its totient is φ = 201210880.

The previous prime is 201309683. The next prime is 201309701. The reversal of 201309697 is 796903102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 796903102 = 2 ⋅398451551.

It can be written as a sum of positive squares in 2 ways, for example, as 160554241 + 40755456 = 12671^2 + 6384^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201309697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201309197) 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, 46288 + ... + 50449.

It is an arithmetic number, because the mean of its divisors is an integer number (50352129).

Almost surely, 2^201309697 is an apocalyptic number.

It is an amenable number.

201309697 is a deficient number, since it is larger than the sum of its proper divisors (98819).

201309697 is an equidigital number, since it uses as much as digits as its factorization.

201309697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98818.

The product of its (nonzero) digits is 20412, while the sum is 37.

The square root of 201309697 is about 14188.3648458869. The cubic root of 201309697 is about 586.0772970524.

The spelling of 201309697 in words is "two hundred one million, three hundred nine thousand, six hundred ninety-seven".