1070428991 has 2 divisors, whose sum is σ = 1070428992. Its totient is φ = 1070428990.

The previous prime is 1070428979. The next prime is 1070429027. The reversal of 1070428991 is 1998240701.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1070428991 is a prime.

It is a super-2 number, since 2×1070428991² = 2291636449546556162, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1070428391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 535214495 + 535214496.

It is an arithmetic number, because the mean of its divisors is an integer number (535214496).

Almost surely, 2^1070428991 is an apocalyptic number.

1070428991 is a deficient number, since it is larger than the sum of its proper divisors (1).

1070428991 is an equidigital number, since it uses as much as digits as its factorization.

1070428991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 41.

The square root of 1070428991 is about 32717.4111292443. The cubic root of 1070428991 is about 1022.9457938202.

The spelling of 1070428991 in words is "one billion, seventy million, four hundred twenty-eight thousand, nine hundred ninety-one".