149401989 has 56 divisors (see below), whose sum is σ = 252666624. Its totient is φ = 87480000.

The previous prime is 149401979. The next prime is 149401999. The reversal of 149401989 is 989104941.

149401989 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (149401979) and next prime (149401999).

It is not a de Polignac number, because 149401989 - 2⁹ = 149401477 is a prime.

It is a super-2 number, since 2×149401989² = 44641908634312242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149401949) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 248289 + ... + 248889.

It is an arithmetic number, because the mean of its divisors is an integer number (4511904).

Almost surely, 2^149401989 is an apocalyptic number.

It is an amenable number.

149401989 is a deficient number, since it is larger than the sum of its proper divisors (103264635).

149401989 is an equidigital number, since it uses as much as digits as its factorization.

149401989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 661 (or 646 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 45.

The square root of 149401989 is about 12223.0106356822. The cubic root of 149401989 is about 530.6222536036.

The spelling of 149401989 in words is "one hundred forty-nine million, four hundred one thousand, nine hundred eighty-nine".