1622748947 has 2 divisors, whose sum is σ = 1622748948. Its totient is φ = 1622748946.

The previous prime is 1622748943. The next prime is 1622748973. The reversal of 1622748947 is 7498472261.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1622748947 - 2² = 1622748943 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1622748895 and 1622748904.

It is not a weakly prime, because it can be changed into another prime (1622748943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 811374473 + 811374474.

It is an arithmetic number, because the mean of its divisors is an integer number (811374474).

Almost surely, 2^1622748947 is an apocalyptic number.

1622748947 is a deficient number, since it is larger than the sum of its proper divisors (1).

1622748947 is an equidigital number, since it uses as much as digits as its factorization.

1622748947 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1354752, while the sum is 50.

The square root of 1622748947 is about 40283.3581892076. The cubic root of 1622748947 is about 1175.1242233535.

The spelling of 1622748947 in words is "one billion, six hundred twenty-two million, seven hundred forty-eight thousand, nine hundred forty-seven".