13091970 has 16 divisors (see below), whose sum is σ = 31420800. Its totient is φ = 3491184.

The previous prime is 13091941. The next prime is 13091971. The reversal of 13091970 is 7919031.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 436399 = 13091970 / (1 + 3 + 0 + 9 + 1 + 9 + 7 + 0).

It is a nialpdrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (13091971) 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, 218170 + ... + 218229.

It is an arithmetic number, because the mean of its divisors is an integer number (1963800).

Almost surely, 2^13091970 is an apocalyptic number.

13091970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13091970 is an abundant number, since it is smaller than the sum of its proper divisors (18328830).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13091970 is a wasteful number, since it uses less digits than its factorization.

13091970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 436409.

The product of its (nonzero) digits is 1701, while the sum is 30.

The square root of 13091970 is about 3618.2827418542. The cubic root of 13091970 is about 235.6866592311.

The spelling of 13091970 in words is "thirteen million, ninety-one thousand, nine hundred seventy".