61987223 has 2 divisors, whose sum is σ = 61987224. Its totient is φ = 61987222.

The previous prime is 61987217. The next prime is 61987241. The reversal of 61987223 is 32278916.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61987223 - 2⁴ = 61987207 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61987243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30993611 + 30993612.

It is an arithmetic number, because the mean of its divisors is an integer number (30993612).

Almost surely, 2^61987223 is an apocalyptic number.

61987223 is a deficient number, since it is larger than the sum of its proper divisors (1).

61987223 is an equidigital number, since it uses as much as digits as its factorization.

61987223 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36288, while the sum is 38.

The square root of 61987223 is about 7873.1964918958. The cubic root of 61987223 is about 395.7619709383.

The spelling of 61987223 in words is "sixty-one million, nine hundred eighty-seven thousand, two hundred twenty-three".