156493663 has 2 divisors, whose sum is σ = 156493664. Its totient is φ = 156493662.

The previous prime is 156493661. The next prime is 156493669. The reversal of 156493663 is 366394651.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 156493663 - 2¹ = 156493661 is a prime.

Together with 156493661, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (156493661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78246831 + 78246832.

It is an arithmetic number, because the mean of its divisors is an integer number (78246832).

Almost surely, 2^156493663 is an apocalyptic number.

156493663 is a deficient number, since it is larger than the sum of its proper divisors (1).

156493663 is an equidigital number, since it uses as much as digits as its factorization.

156493663 is an evil number, because the sum of its binary digits is even.

The product of its digits is 349920, while the sum is 43.

The square root of 156493663 is about 12509.7427231738. The cubic root of 156493663 is about 538.8885036420. Note that the first 3 decimals are identical.

The spelling of 156493663 in words is "one hundred fifty-six million, four hundred ninety-three thousand, six hundred sixty-three".