1355906709 has 24 divisors (see below), whose sum is σ = 2137975840. Its totient is φ = 856359216.

The previous prime is 1355906693. The next prime is 1355906731. The reversal of 1355906709 is 9076095531.

It is not a de Polignac number, because 1355906709 - 2⁴ = 1355906693 is a prime.

It is a super-2 number, since 2×1355906709² = 3676966007022421362, 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 (1355906749) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 142222 + ... + 151455.

Almost surely, 2^1355906709 is an apocalyptic number.

1355906709 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1355906709 is a deficient number, since it is larger than the sum of its proper divisors (782069131).

1355906709 is an equidigital number, since it uses as much as digits as its factorization.

1355906709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293711 (or 293699 counting only the distinct ones).

The product of its (nonzero) digits is 255150, while the sum is 45.

The square root of 1355906709 is about 36822.6385393551. The cubic root of 1355906709 is about 1106.8189934734.

The spelling of 1355906709 in words is "one billion, three hundred fifty-five million, nine hundred six thousand, seven hundred nine".