1072900729 has 4 divisors (see below), whose sum is σ = 1101898084. Its totient is φ = 1043903376.

The previous prime is 1072900723. The next prime is 1072900747. The reversal of 1072900729 is 9270092701.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 973440000 + 99460729 = 31200^2 + 9973^2 .

It is a cyclic number.

It is not a de Polignac number, because 1072900729 - 2⁷ = 1072900601 is a prime.

It is a super-2 number, since 2×1072900729² = 2302231948577462882, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (37), and also a Moran number because the ratio is a prime number: 28997317 = 1072900729 / (1 + 0 + 7 + 2 + 9 + 0 + 0 + 7 + 2 + 9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1072900723) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14498622 + ... + 14498695.

It is an arithmetic number, because the mean of its divisors is an integer number (275474521).

Almost surely, 2^1072900729 is an apocalyptic number.

It is an amenable number.

1072900729 is a deficient number, since it is larger than the sum of its proper divisors (28997355).

1072900729 is an equidigital number, since it uses as much as digits as its factorization.

1072900729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28997354.

The product of its (nonzero) digits is 15876, while the sum is 37.

The square root of 1072900729 is about 32755.1633944940. The cubic root of 1072900729 is about 1023.7325532550.

The spelling of 1072900729 in words is "one billion, seventy-two million, nine hundred thousand, seven hundred twenty-nine".