1220989737 has 8 divisors (see below), whose sum is σ = 1775985120. Its totient is φ = 739993760.

The previous prime is 1220989727. The next prime is 1220989741. The reversal of 1220989737 is 7379890221.

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

It is a de Polignac number, because none of the positive numbers 2^k-1220989737 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1220989727) 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, 18499812 + ... + 18499877.

It is an arithmetic number, because the mean of its divisors is an integer number (221998140).

Almost surely, 2^1220989737 is an apocalyptic number.

It is an amenable number.

1220989737 is a deficient number, since it is larger than the sum of its proper divisors (554995383).

1220989737 is a wasteful number, since it uses less digits than its factorization.

1220989737 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36999703.

The product of its (nonzero) digits is 381024, while the sum is 48.

The square root of 1220989737 is about 34942.6635647599. The cubic root of 1220989737 is about 1068.8186037970.

The spelling of 1220989737 in words is "one billion, two hundred twenty million, nine hundred eighty-nine thousand, seven hundred thirty-seven".