1220731903 has 8 divisors (see below), whose sum is σ = 1298188080. Its totient is φ = 1143903360.

The previous prime is 1220731891. The next prime is 1220731927. The reversal of 1220731903 is 3091370221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1220731903 - 2¹³ = 1220723711 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220731933) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 152893 + ... + 160678.

It is an arithmetic number, because the mean of its divisors is an integer number (162273510).

Almost surely, 2^1220731903 is an apocalyptic number.

1220731903 is a deficient number, since it is larger than the sum of its proper divisors (77456177).

1220731903 is a wasteful number, since it uses less digits than its factorization.

1220731903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313817.

The product of its (nonzero) digits is 2268, while the sum is 28.

The square root of 1220731903 is about 34938.9739832182. The cubic root of 1220731903 is about 1068.7433650603.

The spelling of 1220731903 in words is "one billion, two hundred twenty million, seven hundred thirty-one thousand, nine hundred three".