36978551 has 2 divisors, whose sum is σ = 36978552. Its totient is φ = 36978550.

The previous prime is 36978547. The next prime is 36978559. The reversal of 36978551 is 15587963.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 36978551 - 2² = 36978547 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (36978559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18489275 + 18489276.

It is an arithmetic number, because the mean of its divisors is an integer number (18489276).

Almost surely, 2^36978551 is an apocalyptic number.

36978551 is a deficient number, since it is larger than the sum of its proper divisors (1).

36978551 is an equidigital number, since it uses as much as digits as its factorization.

36978551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 226800, while the sum is 44.

The square root of 36978551 is about 6080.9991777668. Note that the first 3 decimals coincide. The cubic root of 36978551 is about 333.1577827845.

The spelling of 36978551 in words is "thirty-six million, nine hundred seventy-eight thousand, five hundred fifty-one".