1670897145 has 32 divisors (see below), whose sum is σ = 2830492800. Its totient is φ = 839337984.

The previous prime is 1670897143. The next prime is 1670897191. The reversal of 1670897145 is 5417980761.

It is not a de Polignac number, because 1670897145 - 2¹ = 1670897143 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1670897094 and 1670897103.

It is not an unprimeable number, because it can be changed into a prime (1670897143) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 32361 + ... + 66249.

It is an arithmetic number, because the mean of its divisors is an integer number (88452900).

Almost surely, 2^1670897145 is an apocalyptic number.

1670897145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1670897145 is a deficient number, since it is larger than the sum of its proper divisors (1159595655).

1670897145 is a wasteful number, since it uses less digits than its factorization.

1670897145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34089.

The product of its (nonzero) digits is 423360, while the sum is 48.

The square root of 1670897145 is about 40876.6087756800. The cubic root of 1670897145 is about 1186.6334112617.

The spelling of 1670897145 in words is "one billion, six hundred seventy million, eight hundred ninety-seven thousand, one hundred forty-five".