1072609391 has 8 divisors (see below), whose sum is σ = 1258970400. Its totient is φ = 894531168.

The previous prime is 1072609387. The next prime is 1072609411. The reversal of 1072609391 is 1939062701.

It is a happy number.

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 1072609391 - 2² = 1072609387 is a prime.

It is a super-2 number, since 2×1072609391² = 2300981811322781762, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1072609591) 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, 2070416 + ... + 2070933.

It is an arithmetic number, because the mean of its divisors is an integer number (157371300).

Almost surely, 2^1072609391 is an apocalyptic number.

1072609391 is a deficient number, since it is larger than the sum of its proper divisors (186361009).

1072609391 is an equidigital number, since it uses as much as digits as its factorization.

1072609391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4141393.

The product of its (nonzero) digits is 20412, while the sum is 38.

The square root of 1072609391 is about 32750.7158853055. The cubic root of 1072609391 is about 1023.6398826141.

The spelling of 1072609391 in words is "one billion, seventy-two million, six hundred nine thousand, three hundred ninety-one".