36640297 has 4 divisors (see below), whose sum is σ = 36801936. Its totient is φ = 36478660.

The previous prime is 36640291. The next prime is 36640313. The reversal of 36640297 is 79204663.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 79204663 = 23 ⋅3443681.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-36640297 is a prime.

It is a super-2 number, since 2×36640297² = 2685022728496418, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (36640291) 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, 80479 + ... + 80932.

It is an arithmetic number, because the mean of its divisors is an integer number (9200484).

Almost surely, 2^36640297 is an apocalyptic number.

It is an amenable number.

36640297 is a deficient number, since it is larger than the sum of its proper divisors (161639).

36640297 is a wasteful number, since it uses less digits than its factorization.

36640297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161638.

The product of its (nonzero) digits is 54432, while the sum is 37.

The square root of 36640297 is about 6053.1229130094. The cubic root of 36640297 is about 332.1388378770.

The spelling of 36640297 in words is "thirty-six million, six hundred forty thousand, two hundred ninety-seven".