1372226887 has 2 divisors, whose sum is σ = 1372226888. Its totient is φ = 1372226886.

The previous prime is 1372226861. The next prime is 1372226929. The reversal of 1372226887 is 7886222731.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1372226887 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1372226837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 686113443 + 686113444.

It is an arithmetic number, because the mean of its divisors is an integer number (686113444).

Almost surely, 2^1372226887 is an apocalyptic number.

1372226887 is a deficient number, since it is larger than the sum of its proper divisors (1).

1372226887 is an equidigital number, since it uses as much as digits as its factorization.

1372226887 is an evil number, because the sum of its binary digits is even.

The product of its digits is 451584, while the sum is 46.

The square root of 1372226887 is about 37043.5809149170. The cubic root of 1372226887 is about 1111.2419848150.

The spelling of 1372226887 in words is "one billion, three hundred seventy-two million, two hundred twenty-six thousand, eight hundred eighty-seven".