1293172990 has 16 divisors (see below), whose sum is σ = 2329987680. Its totient is φ = 516763360.

The previous prime is 1293172981. The next prime is 1293172997. The reversal of 1293172990 is 992713921.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1293172997) 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, 52405 + ... + 73024.

It is an arithmetic number, because the mean of its divisors is an integer number (145624230).

Almost surely, 2^1293172990 is an apocalyptic number.

1293172990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1293172990 is a deficient number, since it is larger than the sum of its proper divisors (1036814690).

1293172990 is a wasteful number, since it uses less digits than its factorization.

1293172990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126467.

The product of its (nonzero) digits is 61236, while the sum is 43.

The square root of 1293172990 is about 35960.7145368387. The cubic root of 1293172990 is about 1089.4790288774.

The spelling of 1293172990 in words is "one billion, two hundred ninety-three million, one hundred seventy-two thousand, nine hundred ninety".