139972622 has 4 divisors (see below), whose sum is σ = 209958936. Its totient is φ = 69986310.

The previous prime is 139972597. The next prime is 139972633. The reversal of 139972622 is 226279931.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 139972622.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34993154 + ... + 34993157.

It is an arithmetic number, because the mean of its divisors is an integer number (52489734).

Almost surely, 2^139972622 is an apocalyptic number.

139972622 is a deficient number, since it is larger than the sum of its proper divisors (69986314).

139972622 is an equidigital number, since it uses as much as digits as its factorization.

139972622 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69986313.

The product of its digits is 81648, while the sum is 41.

The square root of 139972622 is about 11831.0025779728. The cubic root of 139972622 is about 519.2155603348.

The spelling of 139972622 in words is "one hundred thirty-nine million, nine hundred seventy-two thousand, six hundred twenty-two".