151720990 has 8 divisors (see below), whose sum is σ = 273097800. Its totient is φ = 60688392.

The previous prime is 151720963. The next prime is 151720997. The reversal of 151720990 is 99027151.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (151720997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7586040 + ... + 7586059.

It is an arithmetic number, because the mean of its divisors is an integer number (34137225).

Almost surely, 2^151720990 is an apocalyptic number.

151720990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

151720990 is a deficient number, since it is larger than the sum of its proper divisors (121376810).

151720990 is a wasteful number, since it uses less digits than its factorization.

151720990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15172106.

The product of its (nonzero) digits is 5670, while the sum is 34.

The square root of 151720990 is about 12317.5074588977. The cubic root of 151720990 is about 533.3535899424.

The spelling of 151720990 in words is "one hundred fifty-one million, seven hundred twenty thousand, nine hundred ninety".