137621401 has 2 divisors, whose sum is σ = 137621402. Its totient is φ = 137621400.

The previous prime is 137621377. The next prime is 137621413. The reversal of 137621401 is 104126731.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 114811225 + 22810176 = 10715^2 + 4776^2 .

It is a cyclic number.

It is not a de Polignac number, because 137621401 - 2¹⁷ = 137490329 is a prime.

It is not a weakly prime, because it can be changed into another prime (137621201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68810700 + 68810701.

It is an arithmetic number, because the mean of its divisors is an integer number (68810701).

Almost surely, 2^137621401 is an apocalyptic number.

It is an amenable number.

137621401 is a deficient number, since it is larger than the sum of its proper divisors (1).

137621401 is an equidigital number, since it uses as much as digits as its factorization.

137621401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 137621401 is about 11731.2148134795. The cubic root of 137621401 is about 516.2919158786.

The spelling of 137621401 in words is "one hundred thirty-seven million, six hundred twenty-one thousand, four hundred one".