90151989 has 8 divisors (see below), whose sum is σ = 123134592. Its totient is φ = 58635360.

The previous prime is 90151939. The next prime is 90151991. The reversal of 90151989 is 98915109.

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

It is not a de Polignac number, because 90151989 - 2¹⁹ = 89627701 is a prime.

It is a super-2 number, since 2×90151989² = 16254762241312242, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 90151989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90151909) 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, 366349 + ... + 366594.

It is an arithmetic number, because the mean of its divisors is an integer number (15391824).

Almost surely, 2^90151989 is an apocalyptic number.

It is an amenable number.

90151989 is a deficient number, since it is larger than the sum of its proper divisors (32982603).

90151989 is a wasteful number, since it uses less digits than its factorization.

90151989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 732987.

The product of its (nonzero) digits is 29160, while the sum is 42.

The square root of 90151989 is about 9494.8401250363. The cubic root of 90151989 is about 448.3926010133.

The spelling of 90151989 in words is "ninety million, one hundred fifty-one thousand, nine hundred eighty-nine".