1070620991 has 8 divisors (see below), whose sum is σ = 1205626368. Its totient is φ = 941895000.

The previous prime is 1070620981. The next prime is 1070621047. The reversal of 1070620991 is 1990260701.

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 1070620991 - 2¹⁸ = 1070358847 is a prime.

It is a super-2 number, since 2×1070620991² = 2292458612739644162, 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 (1070620931) 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, 1569485 + ... + 1570166.

It is an arithmetic number, because the mean of its divisors is an integer number (150703296).

Almost surely, 2^1070620991 is an apocalyptic number.

1070620991 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1070620991 is a deficient number, since it is larger than the sum of its proper divisors (135005377).

1070620991 is a wasteful number, since it uses less digits than its factorization.

1070620991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3139693.

The product of its (nonzero) digits is 6804, while the sum is 35.

The square root of 1070620991 is about 32720.3452151716. The cubic root of 1070620991 is about 1023.0069511855.

The spelling of 1070620991 in words is "one billion, seventy million, six hundred twenty thousand, nine hundred ninety-one".