1309870197490 has 64 divisors (see below), whose sum is σ = 2537169868800. Its totient is φ = 485330636736.

The previous prime is 1309870197439. The next prime is 1309870197497. The reversal of 1309870197490 is 947910789031.

It is not an unprimeable number, because it can be changed into a prime (1309870197497) 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, 9027697 + ... + 9171643.

It is an arithmetic number, because the mean of its divisors is an integer number (39643279200).

Almost surely, 2^{1309870197490} is an apocalyptic number.

1309870197490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1309870197490 is a deficient number, since it is larger than the sum of its proper divisors (1227299671310).

1309870197490 is a wasteful number, since it uses less digits than its factorization.

1309870197490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145039.

The product of its (nonzero) digits is 3429216, while the sum is 58.

The spelling of 1309870197490 in words is "one trillion, three hundred nine billion, eight hundred seventy million, one hundred ninety-seven thousand, four hundred ninety".