146037991 has 8 divisors (see below), whose sum is σ = 159728400. Its totient is φ = 132416640.

The previous prime is 146037979. The next prime is 146038031. The reversal of 146037991 is 199730641.

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

It is a cyclic number.

It is not a de Polignac number, because 146037991 - 2⁵ = 146037959 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (146037911) 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, 12786 + ... + 21343.

It is an arithmetic number, because the mean of its divisors is an integer number (19966050).

Almost surely, 2^146037991 is an apocalyptic number.

146037991 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

146037991 is the 6460-th centered heptagonal number.

146037991 is a deficient number, since it is larger than the sum of its proper divisors (13690409).

146037991 is a wasteful number, since it uses less digits than its factorization.

146037991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34529.

The product of its (nonzero) digits is 40824, while the sum is 40.

The square root of 146037991 is about 12084.6179501050. The cubic root of 146037991 is about 526.6094116488.

The spelling of 146037991 in words is "one hundred forty-six million, thirty-seven thousand, nine hundred ninety-one".