36819631 has 2 divisors, whose sum is σ = 36819632. Its totient is φ = 36819630.

The previous prime is 36819617. The next prime is 36819641. The reversal of 36819631 is 13691863.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-36819631 is a prime.

It is a super-2 number, since 2×36819631² = 2711370453952322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (36819641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18409815 + 18409816.

It is an arithmetic number, because the mean of its divisors is an integer number (18409816).

Almost surely, 2^36819631 is an apocalyptic number.

36819631 is a deficient number, since it is larger than the sum of its proper divisors (1).

36819631 is an equidigital number, since it uses as much as digits as its factorization.

36819631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23328, while the sum is 37.

The square root of 36819631 is about 6067.9181767720. The cubic root of 36819631 is about 332.6798348788.

The spelling of 36819631 in words is "thirty-six million, eight hundred nineteen thousand, six hundred thirty-one".