36697521 has 24 divisors (see below), whose sum is σ = 58761984. Its totient is φ = 20291040.

The previous prime is 36697519. The next prime is 36697523. The reversal of 36697521 is 12579663.

It is an interprime number because it is at equal distance from previous prime (36697519) and next prime (36697523).

It is not a de Polignac number, because 36697521 - 2¹ = 36697519 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 36697521.

It is not an unprimeable number, because it can be changed into a prime (36697523) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 531 + ... + 8583.

It is an arithmetic number, because the mean of its divisors is an integer number (2448416).

Almost surely, 2^36697521 is an apocalyptic number.

36697521 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

36697521 is a deficient number, since it is larger than the sum of its proper divisors (22064463).

36697521 is a wasteful number, since it uses less digits than its factorization.

36697521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8101 (or 8094 counting only the distinct ones).

The product of its digits is 68040, while the sum is 39.

The square root of 36697521 is about 6057.8478851817. The cubic root of 36697521 is about 332.3116569537.

The spelling of 36697521 in words is "thirty-six million, six hundred ninety-seven thousand, five hundred twenty-one".